Apply code style formatting and restore partial modifiers on Avalonia views

Linter/formatter pass across the full codebase. Restores required partial
keyword on AXAML code-behind classes that the formatter incorrectly removed.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/ZB.MOM.WW.LmxOpcUa.Client.CLI/CommandBase.cs

@@ -31,7 +31,8 @@ public abstract class CommandBase : ICommand
     [CommandOption("password", 'P', Description = "Password for authentication")]
     public string? Password { get; init; }
 
-    [CommandOption("security", 'S', Description = "Transport security: none, sign, encrypt, signandencrypt (default: none)")]
+    [CommandOption("security", 'S',
+        Description = "Transport security: none, sign, encrypt, signandencrypt (default: none)")]
     public string Security { get; init; } = "none";
 
     [CommandOption("failover-urls", 'F', Description = "Comma-separated failover endpoint URLs for redundancy")]
@@ -40,8 +41,10 @@ public abstract class CommandBase : ICommand
     [CommandOption("verbose", Description = "Enable verbose/debug logging")]
     public bool Verbose { get; init; }
 
+    public abstract ValueTask ExecuteAsync(IConsole console);
+
     /// <summary>
-    /// Creates a <see cref="ConnectionSettings"/> from the common command options.
+    ///     Creates a <see cref="ConnectionSettings" /> from the common command options.
     /// </summary>
     protected ConnectionSettings CreateConnectionSettings()
     {
@@ -64,10 +67,11 @@ public abstract class CommandBase : ICommand
     }
 
     /// <summary>
-    /// Creates a new <see cref="IOpcUaClientService"/>, connects it using the common options,
+    ///     Creates a new <see cref="IOpcUaClientService" />, connects it using the common options,
     ///     and returns both the service and the connection info.
     /// </summary>
-    protected async Task<(IOpcUaClientService Service, ConnectionInfo Info)> CreateServiceAndConnectAsync(CancellationToken ct)
+    protected async Task<(IOpcUaClientService Service, ConnectionInfo Info)> CreateServiceAndConnectAsync(
+        CancellationToken ct)
     {
         var service = _factory.Create();
         var settings = CreateConnectionSettings();
@@ -82,18 +86,12 @@ public abstract class CommandBase : ICommand
     {
         var config = new LoggerConfiguration();
         if (Verbose)
-        {
             config.MinimumLevel.Debug()
                 .WriteTo.Console();
-        }
         else
-        {
             config.MinimumLevel.Warning()
                 .WriteTo.Console();
-        }
 
         Log.Logger = config.CreateLogger();
     }
-
-    public abstract ValueTask ExecuteAsync(IConsole console);
 }

src/ZB.MOM.WW.LmxOpcUa.Client.CLI/Commands/AlarmsCommand.cs

@@ -8,6 +8,10 @@ namespace ZB.MOM.WW.LmxOpcUa.Client.CLI.Commands;
 [Command("alarms", Description = "Subscribe to alarm events")]
 public class AlarmsCommand : CommandBase
 {
+    public AlarmsCommand(IOpcUaClientServiceFactory factory) : base(factory)
+    {
+    }
+
     [CommandOption("node", 'n', Description = "Node ID to monitor for events (default: Server node)")]
     public string? NodeId { get; init; }
 
@@ -17,8 +21,6 @@ public class AlarmsCommand : CommandBase
     [CommandOption("refresh", Description = "Request a ConditionRefresh after subscribing")]
     public bool Refresh { get; init; }
 
-    public AlarmsCommand(IOpcUaClientServiceFactory factory) : base(factory) { }
-
     public override async ValueTask ExecuteAsync(IConsole console)
     {
         ConfigureLogging();
@@ -49,7 +51,6 @@ public class AlarmsCommand : CommandBase
                 $"Subscribed to alarm events (interval: {Interval}ms). Press Ctrl+C to stop.");
 
             if (Refresh)
-            {
                 try
                 {
                     await service.RequestConditionRefreshAsync(ct);
@@ -59,7 +60,6 @@ public class AlarmsCommand : CommandBase
                 {
                     await console.Output.WriteLineAsync($"Condition refresh not supported: {ex.Message}");
                 }
-            }
 
             // Wait until cancellation
             try
@@ -71,7 +71,7 @@ public class AlarmsCommand : CommandBase
                 // Expected on Ctrl+C
             }
 
-            await service.UnsubscribeAlarmsAsync(default);
+            await service.UnsubscribeAlarmsAsync();
             await console.Output.WriteLineAsync("Unsubscribed.");
         }
         finally

src/ZB.MOM.WW.LmxOpcUa.Client.CLI/Commands/BrowseCommand.cs

@@ -3,13 +3,16 @@ using CliFx.Infrastructure;
 using Opc.Ua;
 using ZB.MOM.WW.LmxOpcUa.Client.CLI.Helpers;
 using ZB.MOM.WW.LmxOpcUa.Client.Shared;
-using BrowseResult = ZB.MOM.WW.LmxOpcUa.Client.Shared.Models.BrowseResult;
 
 namespace ZB.MOM.WW.LmxOpcUa.Client.CLI.Commands;
 
 [Command("browse", Description = "Browse the OPC UA address space")]
 public class BrowseCommand : CommandBase
 {
+    public BrowseCommand(IOpcUaClientServiceFactory factory) : base(factory)
+    {
+    }
+
     [CommandOption("node", 'n', Description = "Node ID to browse (default: Objects folder)")]
     public string? NodeId { get; init; }
 
@@ -19,8 +22,6 @@ public class BrowseCommand : CommandBase
     [CommandOption("recursive", 'r', Description = "Browse recursively (uses --depth as max depth)")]
     public bool Recursive { get; init; }
 
-    public BrowseCommand(IOpcUaClientServiceFactory factory) : base(factory) { }
-
     public override async ValueTask ExecuteAsync(IConsole console)
     {
         ConfigureLogging();

src/ZB.MOM.WW.LmxOpcUa.Client.CLI/Commands/ConnectCommand.cs

@@ -7,7 +7,9 @@ namespace ZB.MOM.WW.LmxOpcUa.Client.CLI.Commands;
 [Command("connect", Description = "Test connection to an OPC UA server")]
 public class ConnectCommand : CommandBase
 {
-    public ConnectCommand(IOpcUaClientServiceFactory factory) : base(factory) { }
+    public ConnectCommand(IOpcUaClientServiceFactory factory) : base(factory)
+    {
+    }
 
     public override async ValueTask ExecuteAsync(IConsole console)
     {

src/ZB.MOM.WW.LmxOpcUa.Client.CLI/Commands/HistoryReadCommand.cs

@@ -10,6 +10,10 @@ namespace ZB.MOM.WW.LmxOpcUa.Client.CLI.Commands;
 [Command("historyread", Description = "Read historical data from a node")]
 public class HistoryReadCommand : CommandBase
 {
+    public HistoryReadCommand(IOpcUaClientServiceFactory factory) : base(factory)
+    {
+    }
+
     [CommandOption("node", 'n', Description = "Node ID (e.g. ns=2;s=MyNode)", IsRequired = true)]
     public string NodeId { get; init; } = default!;
 
@@ -28,8 +32,6 @@ public class HistoryReadCommand : CommandBase
     [CommandOption("interval", Description = "Processing interval in milliseconds for aggregates")]
     public double IntervalMs { get; init; } = 3600000;
 
-    public HistoryReadCommand(IOpcUaClientServiceFactory factory) : base(factory) { }
-
     public override async ValueTask ExecuteAsync(IConsole console)
     {
         ConfigureLogging();

src/ZB.MOM.WW.LmxOpcUa.Client.CLI/Commands/ReadCommand.cs

@@ -8,11 +8,13 @@ namespace ZB.MOM.WW.LmxOpcUa.Client.CLI.Commands;
 [Command("read", Description = "Read a value from a node")]
 public class ReadCommand : CommandBase
 {
+    public ReadCommand(IOpcUaClientServiceFactory factory) : base(factory)
+    {
+    }
+
     [CommandOption("node", 'n', Description = "Node ID (e.g. ns=2;s=MyNode)", IsRequired = true)]
     public string NodeId { get; init; } = default!;
 
-    public ReadCommand(IOpcUaClientServiceFactory factory) : base(factory) { }
-
     public override async ValueTask ExecuteAsync(IConsole console)
     {
         ConfigureLogging();

src/ZB.MOM.WW.LmxOpcUa.Client.CLI/Commands/RedundancyCommand.cs

@@ -7,7 +7,9 @@ namespace ZB.MOM.WW.LmxOpcUa.Client.CLI.Commands;
 [Command("redundancy", Description = "Read redundancy state from an OPC UA server")]
 public class RedundancyCommand : CommandBase
 {
-    public RedundancyCommand(IOpcUaClientServiceFactory factory) : base(factory) { }
+    public RedundancyCommand(IOpcUaClientServiceFactory factory) : base(factory)
+    {
+    }
 
     public override async ValueTask ExecuteAsync(IConsole console)
     {
@@ -26,10 +28,7 @@ public class RedundancyCommand : CommandBase
             if (info.ServerUris.Length > 0)
             {
                 await console.Output.WriteLineAsync("Server URIs:");
-                foreach (var uri in info.ServerUris)
+                foreach (var uri in info.ServerUris) await console.Output.WriteLineAsync($"  - {uri}");
-                {
-                    await console.Output.WriteLineAsync($"  - {uri}");
-                }
             }
 
             await console.Output.WriteLineAsync($"Application URI:  {info.ApplicationUri}");

src/ZB.MOM.WW.LmxOpcUa.Client.CLI/Commands/SubscribeCommand.cs

@@ -8,14 +8,16 @@ namespace ZB.MOM.WW.LmxOpcUa.Client.CLI.Commands;
 [Command("subscribe", Description = "Monitor a node for value changes")]
 public class SubscribeCommand : CommandBase
 {
+    public SubscribeCommand(IOpcUaClientServiceFactory factory) : base(factory)
+    {
+    }
+
     [CommandOption("node", 'n', Description = "Node ID to monitor", IsRequired = true)]
     public string NodeId { get; init; } = default!;
 
     [CommandOption("interval", 'i', Description = "Sampling interval in milliseconds")]
     public int Interval { get; init; } = 1000;
 
-    public SubscribeCommand(IOpcUaClientServiceFactory factory) : base(factory) { }
-
     public override async ValueTask ExecuteAsync(IConsole console)
     {
         ConfigureLogging();
@@ -47,7 +49,7 @@ public class SubscribeCommand : CommandBase
                 // Expected on Ctrl+C
             }
 
-            await service.UnsubscribeAsync(nodeId, default);
+            await service.UnsubscribeAsync(nodeId);
             await console.Output.WriteLineAsync("Unsubscribed.");
         }
         finally

src/ZB.MOM.WW.LmxOpcUa.Client.CLI/Commands/WriteCommand.cs

@@ -10,14 +10,16 @@ namespace ZB.MOM.WW.LmxOpcUa.Client.CLI.Commands;
 [Command("write", Description = "Write a value to a node")]
 public class WriteCommand : CommandBase
 {
+    public WriteCommand(IOpcUaClientServiceFactory factory) : base(factory)
+    {
+    }
+
     [CommandOption("node", 'n', Description = "Node ID (e.g. ns=2;s=MyNode)", IsRequired = true)]
     public string NodeId { get; init; } = default!;
 
     [CommandOption("value", 'v', Description = "Value to write", IsRequired = true)]
     public string Value { get; init; } = default!;
 
-    public WriteCommand(IOpcUaClientServiceFactory factory) : base(factory) { }
-
     public override async ValueTask ExecuteAsync(IConsole console)
     {
         ConfigureLogging();

src/ZB.MOM.WW.LmxOpcUa.Client.CLI/Helpers/NodeIdParser.cs

@@ -3,16 +3,16 @@ using Opc.Ua;
 namespace ZB.MOM.WW.LmxOpcUa.Client.CLI.Helpers;
 
 /// <summary>
-/// Parses node ID strings into OPC UA <see cref="NodeId"/> objects.
+///     Parses node ID strings into OPC UA <see cref="NodeId" /> objects.
 ///     Supports standard OPC UA format (e.g., "ns=2;s=MyNode", "i=85") and bare numeric IDs.
 /// </summary>
 public static class NodeIdParser
 {
     /// <summary>
-    /// Parses a string into a <see cref="NodeId"/>. Returns <c>null</c> if the input is null or empty.
+    ///     Parses a string into a <see cref="NodeId" />. Returns <c>null</c> if the input is null or empty.
     /// </summary>
     /// <param name="nodeIdString">The node ID string to parse.</param>
-    /// <returns>A parsed <see cref="NodeId"/>, or <c>null</c> if input is null/empty.</returns>
+    /// <returns>A parsed <see cref="NodeId" />, or <c>null</c> if input is null/empty.</returns>
     /// <exception cref="FormatException">Thrown when the string cannot be parsed as a valid NodeId.</exception>
     public static NodeId? Parse(string? nodeIdString)
     {
@@ -24,7 +24,6 @@ public static class NodeIdParser
         // Standard OPC UA format: ns=X;s=..., ns=X;i=..., ns=X;g=..., ns=X;b=...
         // Also: s=..., i=..., g=..., b=... (namespace 0 implied)
         if (trimmed.Contains('='))
-        {
             try
             {
                 return NodeId.Parse(trimmed);
@@ -33,22 +32,19 @@ public static class NodeIdParser
             {
                 throw new FormatException($"Invalid node ID format: '{nodeIdString}'", ex);
             }
-        }
 
         // Bare numeric: treat as namespace 0, numeric identifier
-        if (uint.TryParse(trimmed, out var numericId))
+        if (uint.TryParse(trimmed, out var numericId)) return new NodeId(numericId);
-        {
-            return new NodeId(numericId);
-        }
 
-        throw new FormatException($"Invalid node ID format: '{nodeIdString}'. Expected format like 'ns=2;s=MyNode', 'i=85', or a numeric ID.");
+        throw new FormatException(
+            $"Invalid node ID format: '{nodeIdString}'. Expected format like 'ns=2;s=MyNode', 'i=85', or a numeric ID.");
     }
 
     /// <summary>
-    /// Parses a string into a <see cref="NodeId"/>, throwing if the input is null or empty.
+    ///     Parses a string into a <see cref="NodeId" />, throwing if the input is null or empty.
     /// </summary>
     /// <param name="nodeIdString">The node ID string to parse.</param>
-    /// <returns>A parsed <see cref="NodeId"/>.</returns>
+    /// <returns>A parsed <see cref="NodeId" />.</returns>
     /// <exception cref="ArgumentException">Thrown when the input is null or empty.</exception>
     /// <exception cref="FormatException">Thrown when the string cannot be parsed as a valid NodeId.</exception>
     public static NodeId ParseRequired(string? nodeIdString)

src/ZB.MOM.WW.LmxOpcUa.Client.CLI/Program.cs

@@ -6,10 +6,7 @@ return await new CliApplicationBuilder()
     .UseTypeActivator(type =>
     {
         // Inject the default factory into commands that derive from CommandBase
-        if (type.IsSubclassOf(typeof(CommandBase)))
+        if (type.IsSubclassOf(typeof(CommandBase))) return Activator.CreateInstance(type, CommandBase.DefaultFactory)!;
-        {
-            return Activator.CreateInstance(type, CommandBase.DefaultFactory)!;
-        }
         return Activator.CreateInstance(type)!;
     })
     .SetExecutableName("lmxopcua-cli")

src/ZB.MOM.WW.LmxOpcUa.Client.CLI/ZB.MOM.WW.LmxOpcUa.Client.CLI.csproj

@@ -9,13 +9,13 @@
     </PropertyGroup>
 
     <ItemGroup>
-    <PackageReference Include="CliFx" Version="2.3.6" />
+        <PackageReference Include="CliFx" Version="2.3.6"/>
-    <PackageReference Include="Serilog" Version="4.2.0" />
+        <PackageReference Include="Serilog" Version="4.2.0"/>
-    <PackageReference Include="Serilog.Sinks.Console" Version="6.0.0" />
+        <PackageReference Include="Serilog.Sinks.Console" Version="6.0.0"/>
     </ItemGroup>
 
     <ItemGroup>
-    <ProjectReference Include="..\ZB.MOM.WW.LmxOpcUa.Client.Shared\ZB.MOM.WW.LmxOpcUa.Client.Shared.csproj" />
+        <ProjectReference Include="..\ZB.MOM.WW.LmxOpcUa.Client.Shared\ZB.MOM.WW.LmxOpcUa.Client.Shared.csproj"/>
     </ItemGroup>
 
 </Project>

src/ZB.MOM.WW.LmxOpcUa.Client.Shared/Adapters/DefaultApplicationConfigurationFactory.cs

@@ -54,11 +54,9 @@ internal sealed class DefaultApplicationConfigurationFactory : IApplicationConfi
         await config.Validate(ApplicationType.Client);
 
         if (settings.AutoAcceptCertificates)
-        {
             config.CertificateValidator.CertificateValidation += (_, e) => e.Accept = true;
-        }
 
-        if (settings.SecurityMode != Models.SecurityMode.None)
+        if (settings.SecurityMode != SecurityMode.None)
         {
             var app = new ApplicationInstance
             {

src/ZB.MOM.WW.LmxOpcUa.Client.Shared/Adapters/DefaultEndpointDiscovery.cs

@@ -11,7 +11,8 @@ internal sealed class DefaultEndpointDiscovery : IEndpointDiscovery
 {
     private static readonly ILogger Logger = Log.ForContext<DefaultEndpointDiscovery>();
 
-    public EndpointDescription SelectEndpoint(ApplicationConfiguration config, string endpointUrl, MessageSecurityMode requestedMode)
+    public EndpointDescription SelectEndpoint(ApplicationConfiguration config, string endpointUrl,
+        MessageSecurityMode requestedMode)
     {
         if (requestedMode == MessageSecurityMode.None)
         {
@@ -54,7 +55,8 @@ internal sealed class DefaultEndpointDiscovery : IEndpointDiscovery
         {
             var builder = new UriBuilder(best.EndpointUrl) { Host = requestedUri.Host };
             best.EndpointUrl = builder.ToString();
-            Logger.Debug("Rewrote endpoint host from {ServerHost} to {RequestedHost}", serverUri.Host, requestedUri.Host);
+            Logger.Debug("Rewrote endpoint host from {ServerHost} to {RequestedHost}", serverUri.Host,
+                requestedUri.Host);
         }
 
         return best;

src/ZB.MOM.WW.LmxOpcUa.Client.Shared/Adapters/DefaultSessionAdapter.cs

@@ -67,14 +67,14 @@ internal sealed class DefaultSessionAdapter : ISessionAdapter
             true,
             nodeClassMask);
 
-        return (continuationPoint, references ?? new ReferenceDescriptionCollection());
+        return (continuationPoint, references ?? []);
     }
 
     public async Task<(byte[]? ContinuationPoint, ReferenceDescriptionCollection References)> BrowseNextAsync(
         byte[] continuationPoint, CancellationToken ct)
     {
         var (_, nextCp, nextRefs) = await _session.BrowseNextAsync(null, false, continuationPoint);
-        return (nextCp, nextRefs ?? new ReferenceDescriptionCollection());
+        return (nextCp, nextRefs ?? []);
     }
 
     public async Task<bool> HasChildrenAsync(NodeId nodeId, CancellationToken ct)
@@ -134,26 +134,24 @@ internal sealed class DefaultSessionAdapter : ISessionAdapter
                 break;
 
             if (result.HistoryData is ExtensionObject ext && ext.Body is HistoryData historyData)
-            {
                 allValues.AddRange(historyData.DataValues);
-            }
 
             continuationPoint = result.ContinuationPoint;
-        }
+        } while (continuationPoint != null && continuationPoint.Length > 0 && allValues.Count < maxValues);
-        while (continuationPoint != null && continuationPoint.Length > 0 && allValues.Count < maxValues);
 
         return allValues;
     }
 
     public async Task<IReadOnlyList<DataValue>> HistoryReadAggregateAsync(
-        NodeId nodeId, DateTime startTime, DateTime endTime, NodeId aggregateId, double intervalMs, CancellationToken ct)
+        NodeId nodeId, DateTime startTime, DateTime endTime, NodeId aggregateId, double intervalMs,
+        CancellationToken ct)
     {
         var details = new ReadProcessedDetails
         {
             StartTime = startTime,
             EndTime = endTime,
             ProcessingInterval = intervalMs,
-            AggregateType = new NodeIdCollection { aggregateId }
+            AggregateType = [aggregateId]
         };
 
         var nodesToRead = new HistoryReadValueIdCollection
@@ -178,10 +176,8 @@ internal sealed class DefaultSessionAdapter : ISessionAdapter
             if (!StatusCode.IsBad(result.StatusCode) &&
                 result.HistoryData is ExtensionObject ext &&
                 ext.Body is HistoryData historyData)
-            {
                 allValues.AddRange(historyData.DataValues);
         }
-        }
 
         return allValues;
     }
@@ -204,10 +200,7 @@ internal sealed class DefaultSessionAdapter : ISessionAdapter
     {
         try
         {
-            if (_session.Connected)
+            if (_session.Connected) _session.Close();
-            {
-                _session.Close();
-            }
         }
         catch (Exception ex)
         {
@@ -219,12 +212,12 @@ internal sealed class DefaultSessionAdapter : ISessionAdapter
     {
         try
         {
-            if (_session.Connected)
+            if (_session.Connected) _session.Close();
+        }
+        catch
         {
-                _session.Close();
         }
-        }
+
-        catch { }
         _session.Dispose();
     }
 }

src/ZB.MOM.WW.LmxOpcUa.Client.Shared/Adapters/DefaultSubscriptionAdapter.cs

@@ -10,8 +10,8 @@ namespace ZB.MOM.WW.LmxOpcUa.Client.Shared.Adapters;
 internal sealed class DefaultSubscriptionAdapter : ISubscriptionAdapter
 {
     private static readonly ILogger Logger = Log.ForContext<DefaultSubscriptionAdapter>();
-    private readonly Subscription _subscription;
     private readonly Dictionary<uint, MonitoredItem> _monitoredItems = new();
+    private readonly Subscription _subscription;
 
     public DefaultSubscriptionAdapter(Subscription subscription)
     {
@@ -33,9 +33,7 @@ internal sealed class DefaultSubscriptionAdapter : ISubscriptionAdapter
         item.Notification += (_, e) =>
         {
             if (e.NotificationValue is MonitoredItemNotification notification)
-            {
                 onDataChange(nodeId.ToString(), notification.Value);
-            }
         };
 
         _subscription.AddItem(item);
@@ -75,10 +73,7 @@ internal sealed class DefaultSubscriptionAdapter : ISubscriptionAdapter
 
         item.Notification += (_, e) =>
         {
-            if (e.NotificationValue is EventFieldList eventFields)
+            if (e.NotificationValue is EventFieldList eventFields) onEvent(eventFields);
-            {
-                onEvent(eventFields);
-            }
         };
 
         _subscription.AddItem(item);
@@ -106,6 +101,7 @@ internal sealed class DefaultSubscriptionAdapter : ISubscriptionAdapter
         {
             Logger.Warning(ex, "Error deleting subscription");
         }
+
         _monitoredItems.Clear();
     }
 
@@ -115,7 +111,10 @@ internal sealed class DefaultSubscriptionAdapter : ISubscriptionAdapter
         {
             _subscription.Delete(true);
         }
-        catch { }
+        catch
+        {
+        }
+
         _monitoredItems.Clear();
     }
 }

src/ZB.MOM.WW.LmxOpcUa.Client.Shared/Adapters/IEndpointDiscovery.cs

@@ -11,5 +11,6 @@ internal interface IEndpointDiscovery
     ///     Discovers endpoints at the given URL and returns the best match for the requested security mode.
     ///     Also rewrites the endpoint URL hostname to match the requested URL when they differ.
     /// </summary>
-    EndpointDescription SelectEndpoint(ApplicationConfiguration config, string endpointUrl, MessageSecurityMode requestedMode);
+    EndpointDescription SelectEndpoint(ApplicationConfiguration config, string endpointUrl,
+        MessageSecurityMode requestedMode);
 }

src/ZB.MOM.WW.LmxOpcUa.Client.Shared/Adapters/ISessionAdapter.cs

@@ -45,12 +45,14 @@ internal interface ISessionAdapter : IDisposable
     /// <summary>
     ///     Reads raw historical data.
     /// </summary>
-    Task<IReadOnlyList<DataValue>> HistoryReadRawAsync(NodeId nodeId, DateTime startTime, DateTime endTime, int maxValues, CancellationToken ct = default);
+    Task<IReadOnlyList<DataValue>> HistoryReadRawAsync(NodeId nodeId, DateTime startTime, DateTime endTime,
+        int maxValues, CancellationToken ct = default);
 
     /// <summary>
     ///     Reads processed/aggregate historical data.
     /// </summary>
-    Task<IReadOnlyList<DataValue>> HistoryReadAggregateAsync(NodeId nodeId, DateTime startTime, DateTime endTime, NodeId aggregateId, double intervalMs, CancellationToken ct = default);
+    Task<IReadOnlyList<DataValue>> HistoryReadAggregateAsync(NodeId nodeId, DateTime startTime, DateTime endTime,
+        NodeId aggregateId, double intervalMs, CancellationToken ct = default);
 
     /// <summary>
     ///     Creates a subscription adapter for this session.

src/ZB.MOM.WW.LmxOpcUa.Client.Shared/Adapters/ISubscriptionAdapter.cs

@@ -17,7 +17,8 @@ internal interface ISubscriptionAdapter : IDisposable
     /// <param name="onDataChange">Callback when data changes. Receives (nodeIdString, DataValue).</param>
     /// <param name="ct">Cancellation token.</param>
     /// <returns>A client handle that can be used to remove the item.</returns>
-    Task<uint> AddDataChangeMonitoredItemAsync(NodeId nodeId, int samplingIntervalMs, Action<string, DataValue> onDataChange, CancellationToken ct = default);
+    Task<uint> AddDataChangeMonitoredItemAsync(NodeId nodeId, int samplingIntervalMs,
+        Action<string, DataValue> onDataChange, CancellationToken ct = default);
 
     /// <summary>
     ///     Removes a previously added monitored item by its client handle.
@@ -33,7 +34,8 @@ internal interface ISubscriptionAdapter : IDisposable
     /// <param name="onEvent">Callback when events arrive. Receives the event field list.</param>
     /// <param name="ct">Cancellation token.</param>
     /// <returns>A client handle for the monitored item.</returns>
-    Task<uint> AddEventMonitoredItemAsync(NodeId nodeId, int samplingIntervalMs, EventFilter filter, Action<EventFieldList> onEvent, CancellationToken ct = default);
+    Task<uint> AddEventMonitoredItemAsync(NodeId nodeId, int samplingIntervalMs, EventFilter filter,
+        Action<EventFieldList> onEvent, CancellationToken ct = default);
 
     /// <summary>
     ///     Requests a condition refresh for this subscription.

src/ZB.MOM.WW.LmxOpcUa.Client.Shared/Helpers/FailoverUrlParser.cs

@@ -15,7 +15,7 @@ public static class FailoverUrlParser
     public static string[] Parse(string primaryUrl, string? failoverCsv)
     {
         if (string.IsNullOrWhiteSpace(failoverCsv))
-            return new[] { primaryUrl };
+            return [primaryUrl];
 
         var urls = new List<string> { primaryUrl };
         foreach (var url in failoverCsv.Split(',', StringSplitOptions.RemoveEmptyEntries))
@@ -24,6 +24,7 @@ public static class FailoverUrlParser
             if (!string.IsNullOrEmpty(trimmed) && !urls.Contains(trimmed, StringComparer.OrdinalIgnoreCase))
                 urls.Add(trimmed);
         }
+
         return urls.ToArray();
     }
 
@@ -36,7 +37,7 @@ public static class FailoverUrlParser
     public static string[] Parse(string primaryUrl, string[]? failoverUrls)
     {
         if (failoverUrls == null || failoverUrls.Length == 0)
-            return new[] { primaryUrl };
+            return [primaryUrl];
 
         var urls = new List<string> { primaryUrl };
         foreach (var url in failoverUrls)
@@ -45,6 +46,7 @@ public static class FailoverUrlParser
             if (!string.IsNullOrEmpty(trimmed) && !urls.Contains(trimmed, StringComparer.OrdinalIgnoreCase))
                 urls.Add(trimmed);
         }
+
         return urls.ToArray();
     }
 }

src/ZB.MOM.WW.LmxOpcUa.Client.Shared/Helpers/SecurityModeMapper.cs

@@ -9,7 +9,7 @@ namespace ZB.MOM.WW.LmxOpcUa.Client.Shared.Helpers;
 public static class SecurityModeMapper
 {
     /// <summary>
-    /// Converts a <see cref="SecurityMode"/> to an OPC UA <see cref="MessageSecurityMode"/>.
+    ///     Converts a <see cref="SecurityMode" /> to an OPC UA <see cref="MessageSecurityMode" />.
     /// </summary>
     public static MessageSecurityMode ToMessageSecurityMode(SecurityMode mode)
     {
@@ -23,7 +23,7 @@ public static class SecurityModeMapper
     }
 
     /// <summary>
-    /// Parses a string to a <see cref="SecurityMode"/> value, case-insensitively.
+    ///     Parses a string to a <see cref="SecurityMode" /> value, case-insensitively.
     /// </summary>
     /// <param name="value">The string to parse (e.g., "none", "sign", "encrypt", "signandencrypt").</param>
     /// <returns>The corresponding SecurityMode.</returns>

src/ZB.MOM.WW.LmxOpcUa.Client.Shared/IOpcUaClientService.cs

@@ -1,5 +1,6 @@
 using Opc.Ua;
 using ZB.MOM.WW.LmxOpcUa.Client.Shared.Models;
+using BrowseResult = ZB.MOM.WW.LmxOpcUa.Client.Shared.Models.BrowseResult;
 
 namespace ZB.MOM.WW.LmxOpcUa.Client.Shared;
 
@@ -8,15 +9,15 @@ namespace ZB.MOM.WW.LmxOpcUa.Client.Shared;
 /// </summary>
 public interface IOpcUaClientService : IDisposable
 {
-    Task<ConnectionInfo> ConnectAsync(ConnectionSettings settings, CancellationToken ct = default);
-    Task DisconnectAsync(CancellationToken ct = default);
     bool IsConnected { get; }
     ConnectionInfo? CurrentConnectionInfo { get; }
+    Task<ConnectionInfo> ConnectAsync(ConnectionSettings settings, CancellationToken ct = default);
+    Task DisconnectAsync(CancellationToken ct = default);
 
     Task<DataValue> ReadValueAsync(NodeId nodeId, CancellationToken ct = default);
     Task<StatusCode> WriteValueAsync(NodeId nodeId, object value, CancellationToken ct = default);
 
-    Task<IReadOnlyList<Models.BrowseResult>> BrowseAsync(NodeId? parentNodeId = null, CancellationToken ct = default);
+    Task<IReadOnlyList<BrowseResult>> BrowseAsync(NodeId? parentNodeId = null, CancellationToken ct = default);
 
     Task SubscribeAsync(NodeId nodeId, int intervalMs = 1000, CancellationToken ct = default);
     Task UnsubscribeAsync(NodeId nodeId, CancellationToken ct = default);
@@ -25,8 +26,11 @@ public interface IOpcUaClientService : IDisposable
     Task UnsubscribeAlarmsAsync(CancellationToken ct = default);
     Task RequestConditionRefreshAsync(CancellationToken ct = default);
 
-    Task<IReadOnlyList<DataValue>> HistoryReadRawAsync(NodeId nodeId, DateTime startTime, DateTime endTime, int maxValues = 1000, CancellationToken ct = default);
+    Task<IReadOnlyList<DataValue>> HistoryReadRawAsync(NodeId nodeId, DateTime startTime, DateTime endTime,
-    Task<IReadOnlyList<DataValue>> HistoryReadAggregateAsync(NodeId nodeId, DateTime startTime, DateTime endTime, AggregateType aggregate, double intervalMs = 3600000, CancellationToken ct = default);
+        int maxValues = 1000, CancellationToken ct = default);
+
+    Task<IReadOnlyList<DataValue>> HistoryReadAggregateAsync(NodeId nodeId, DateTime startTime, DateTime endTime,
+        AggregateType aggregate, double intervalMs = 3600000, CancellationToken ct = default);
 
     Task<RedundancyInfo> GetRedundancyInfoAsync(CancellationToken ct = default);
 

src/ZB.MOM.WW.LmxOpcUa.Client.Shared/IOpcUaClientServiceFactory.cs

@@ -1,7 +1,7 @@
 namespace ZB.MOM.WW.LmxOpcUa.Client.Shared;
 
 /// <summary>
-/// Factory for creating <see cref="IOpcUaClientService"/> instances.
+///     Factory for creating <see cref="IOpcUaClientService" /> instances.
 /// </summary>
 public interface IOpcUaClientServiceFactory
 {

src/ZB.MOM.WW.LmxOpcUa.Client.Shared/Models/AlarmEventArgs.cs

@@ -5,6 +5,26 @@ namespace ZB.MOM.WW.LmxOpcUa.Client.Shared.Models;
 /// </summary>
 public sealed class AlarmEventArgs : EventArgs
 {
+    public AlarmEventArgs(
+        string sourceName,
+        string conditionName,
+        ushort severity,
+        string message,
+        bool retain,
+        bool activeState,
+        bool ackedState,
+        DateTime time)
+    {
+        SourceName = sourceName;
+        ConditionName = conditionName;
+        Severity = severity;
+        Message = message;
+        Retain = retain;
+        ActiveState = activeState;
+        AckedState = ackedState;
+        Time = time;
+    }
+
     /// <summary>The name of the source object that raised the alarm.</summary>
     public string SourceName { get; }
 
@@ -28,24 +48,4 @@ public sealed class AlarmEventArgs : EventArgs
 
     /// <summary>The time the event occurred.</summary>
     public DateTime Time { get; }
-
-    public AlarmEventArgs(
-        string sourceName,
-        string conditionName,
-        ushort severity,
-        string message,
-        bool retain,
-        bool activeState,
-        bool ackedState,
-        DateTime time)
-    {
-        SourceName = sourceName;
-        ConditionName = conditionName;
-        Severity = severity;
-        Message = message;
-        Retain = retain;
-        ActiveState = activeState;
-        AckedState = ackedState;
-        Time = time;
-    }
 }

src/ZB.MOM.WW.LmxOpcUa.Client.Shared/Models/BrowseResult.cs

@@ -5,6 +5,14 @@ namespace ZB.MOM.WW.LmxOpcUa.Client.Shared.Models;
 /// </summary>
 public sealed class BrowseResult
 {
+    public BrowseResult(string nodeId, string displayName, string nodeClass, bool hasChildren)
+    {
+        NodeId = nodeId;
+        DisplayName = displayName;
+        NodeClass = nodeClass;
+        HasChildren = hasChildren;
+    }
+
     /// <summary>
     ///     The string representation of the node's NodeId.
     /// </summary>
@@ -24,12 +32,4 @@ public sealed class BrowseResult
     ///     Whether the node has child references.
     /// </summary>
     public bool HasChildren { get; }
-
-    public BrowseResult(string nodeId, string displayName, string nodeClass, bool hasChildren)
-    {
-        NodeId = nodeId;
-        DisplayName = displayName;
-        NodeClass = nodeClass;
-        HasChildren = hasChildren;
-    }
 }

src/ZB.MOM.WW.LmxOpcUa.Client.Shared/Models/ConnectionInfo.cs

@@ -5,6 +5,22 @@ namespace ZB.MOM.WW.LmxOpcUa.Client.Shared.Models;
 /// </summary>
 public sealed class ConnectionInfo
 {
+    public ConnectionInfo(
+        string endpointUrl,
+        string serverName,
+        string securityMode,
+        string securityPolicyUri,
+        string sessionId,
+        string sessionName)
+    {
+        EndpointUrl = endpointUrl;
+        ServerName = serverName;
+        SecurityMode = securityMode;
+        SecurityPolicyUri = securityPolicyUri;
+        SessionId = sessionId;
+        SessionName = sessionName;
+    }
+
     /// <summary>The endpoint URL of the connected server.</summary>
     public string EndpointUrl { get; }
 
@@ -22,20 +38,4 @@ public sealed class ConnectionInfo
 
     /// <summary>The session name.</summary>
     public string SessionName { get; }
-
-    public ConnectionInfo(
-        string endpointUrl,
-        string serverName,
-        string securityMode,
-        string securityPolicyUri,
-        string sessionId,
-        string sessionName)
-    {
-        EndpointUrl = endpointUrl;
-        ServerName = serverName;
-        SecurityMode = securityMode;
-        SecurityPolicyUri = securityPolicyUri;
-        SessionId = sessionId;
-        SessionName = sessionName;
-    }
 }

src/ZB.MOM.WW.LmxOpcUa.Client.Shared/Models/ConnectionSettings.cs

@@ -26,7 +26,7 @@ public sealed class ConnectionSettings
     public string? Password { get; set; }
 
     /// <summary>
-    /// Transport security mode. Defaults to <see cref="Models.SecurityMode.None"/>.
+    ///     Transport security mode. Defaults to <see cref="Models.SecurityMode.None" />.
     /// </summary>
     public SecurityMode SecurityMode { get; set; } = SecurityMode.None;
 
@@ -57,7 +57,8 @@ public sealed class ConnectionSettings
             throw new ArgumentException("EndpointUrl must not be null or empty.", nameof(EndpointUrl));
 
         if (SessionTimeoutSeconds <= 0)
-            throw new ArgumentException("SessionTimeoutSeconds must be greater than zero.", nameof(SessionTimeoutSeconds));
+            throw new ArgumentException("SessionTimeoutSeconds must be greater than zero.",
+                nameof(SessionTimeoutSeconds));
 
         if (SessionTimeoutSeconds > 3600)
             throw new ArgumentException("SessionTimeoutSeconds must not exceed 3600.", nameof(SessionTimeoutSeconds));

src/ZB.MOM.WW.LmxOpcUa.Client.Shared/Models/ConnectionStateChangedEventArgs.cs

@@ -5,6 +5,13 @@ namespace ZB.MOM.WW.LmxOpcUa.Client.Shared.Models;
 /// </summary>
 public sealed class ConnectionStateChangedEventArgs : EventArgs
 {
+    public ConnectionStateChangedEventArgs(ConnectionState oldState, ConnectionState newState, string endpointUrl)
+    {
+        OldState = oldState;
+        NewState = newState;
+        EndpointUrl = endpointUrl;
+    }
+
     /// <summary>The previous connection state.</summary>
     public ConnectionState OldState { get; }
 
@@ -13,11 +20,4 @@ public sealed class ConnectionStateChangedEventArgs : EventArgs
 
     /// <summary>The endpoint URL associated with the state change.</summary>
     public string EndpointUrl { get; }
-
-    public ConnectionStateChangedEventArgs(ConnectionState oldState, ConnectionState newState, string endpointUrl)
-    {
-        OldState = oldState;
-        NewState = newState;
-        EndpointUrl = endpointUrl;
-    }
 }

src/ZB.MOM.WW.LmxOpcUa.Client.Shared/Models/DataChangedEventArgs.cs

@@ -7,15 +7,15 @@ namespace ZB.MOM.WW.LmxOpcUa.Client.Shared.Models;
 /// </summary>
 public sealed class DataChangedEventArgs : EventArgs
 {
-    /// <summary>The string representation of the node that changed.</summary>
-    public string NodeId { get; }
-
-    /// <summary>The new data value from the server.</summary>
-    public DataValue Value { get; }
-
     public DataChangedEventArgs(string nodeId, DataValue value)
     {
         NodeId = nodeId;
         Value = value;
     }
+
+    /// <summary>The string representation of the node that changed.</summary>
+    public string NodeId { get; }
+
+    /// <summary>The new data value from the server.</summary>
+    public DataValue Value { get; }
 }

src/ZB.MOM.WW.LmxOpcUa.Client.Shared/Models/RedundancyInfo.cs

@@ -5,6 +5,14 @@ namespace ZB.MOM.WW.LmxOpcUa.Client.Shared.Models;
 /// </summary>
 public sealed class RedundancyInfo
 {
+    public RedundancyInfo(string mode, byte serviceLevel, string[] serverUris, string applicationUri)
+    {
+        Mode = mode;
+        ServiceLevel = serviceLevel;
+        ServerUris = serverUris;
+        ApplicationUri = applicationUri;
+    }
+
     /// <summary>The redundancy mode (e.g., "None", "Cold", "Warm", "Hot").</summary>
     public string Mode { get; }
 
@@ -16,12 +24,4 @@ public sealed class RedundancyInfo
 
     /// <summary>The application URI of the connected server.</summary>
     public string ApplicationUri { get; }
-
-    public RedundancyInfo(string mode, byte serviceLevel, string[] serverUris, string applicationUri)
-    {
-        Mode = mode;
-        ServiceLevel = serviceLevel;
-        ServerUris = serverUris;
-        ApplicationUri = applicationUri;
-    }
 }

src/ZB.MOM.WW.LmxOpcUa.Client.Shared/OpcUaClientService.cs

@@ -1,42 +1,39 @@
+using System.Text;
 using Opc.Ua;
 using Serilog;
 using ZB.MOM.WW.LmxOpcUa.Client.Shared.Adapters;
 using ZB.MOM.WW.LmxOpcUa.Client.Shared.Helpers;
 using ZB.MOM.WW.LmxOpcUa.Client.Shared.Models;
+using BrowseResult = ZB.MOM.WW.LmxOpcUa.Client.Shared.Models.BrowseResult;
 
 namespace ZB.MOM.WW.LmxOpcUa.Client.Shared;
 
 /// <summary>
-/// Full implementation of <see cref="IOpcUaClientService"/> using adapter abstractions for testability.
+///     Full implementation of <see cref="IOpcUaClientService" /> using adapter abstractions for testability.
 /// </summary>
 public sealed class OpcUaClientService : IOpcUaClientService
 {
     private static readonly ILogger Logger = Log.ForContext<OpcUaClientService>();
 
-    private readonly IApplicationConfigurationFactory _configFactory;
-    private readonly IEndpointDiscovery _endpointDiscovery;
-    private readonly ISessionFactory _sessionFactory;
-
-    private ISessionAdapter? _session;
-    private ISubscriptionAdapter? _dataSubscription;
-    private ISubscriptionAdapter? _alarmSubscription;
-    private ConnectionState _state = ConnectionState.Disconnected;
-    private ConnectionSettings? _settings;
-    private string[]? _allEndpointUrls;
-    private int _currentEndpointIndex;
-    private bool _disposed;
-
     // Track active data subscriptions for replay after failover
     private readonly Dictionary<string, (NodeId NodeId, int IntervalMs, uint Handle)> _activeDataSubscriptions = new();
+
+    private readonly IApplicationConfigurationFactory _configFactory;
+    private readonly IEndpointDiscovery _endpointDiscovery;
+
+    private readonly ISessionFactory _sessionFactory;
+
     // Track alarm subscription state for replay after failover
     private (NodeId? SourceNodeId, int IntervalMs)? _activeAlarmSubscription;
+    private ISubscriptionAdapter? _alarmSubscription;
+    private string[]? _allEndpointUrls;
+    private int _currentEndpointIndex;
+    private ISubscriptionAdapter? _dataSubscription;
+    private bool _disposed;
 
-    public event EventHandler<DataChangedEventArgs>? DataChanged;
+    private ISessionAdapter? _session;
-    public event EventHandler<AlarmEventArgs>? AlarmEvent;
+    private ConnectionSettings? _settings;
-    public event EventHandler<ConnectionStateChangedEventArgs>? ConnectionStateChanged;
+    private ConnectionState _state = ConnectionState.Disconnected;
-
-    public bool IsConnected => _state == ConnectionState.Connected && _session?.Connected == true;
-    public ConnectionInfo? CurrentConnectionInfo { get; private set; }
 
     /// <summary>
     ///     Creates a new OpcUaClientService with the specified adapter dependencies.
@@ -62,6 +59,13 @@ public sealed class OpcUaClientService : IOpcUaClientService
     {
     }
 
+    public event EventHandler<DataChangedEventArgs>? DataChanged;
+    public event EventHandler<AlarmEventArgs>? AlarmEvent;
+    public event EventHandler<ConnectionStateChangedEventArgs>? ConnectionStateChanged;
+
+    public bool IsConnected => _state == ConnectionState.Connected && _session?.Connected == true;
+    public ConnectionInfo? CurrentConnectionInfo { get; private set; }
+
     public async Task<ConnectionInfo> ConnectAsync(ConnectionSettings settings, CancellationToken ct = default)
     {
         ThrowIfDisposed();
@@ -80,10 +84,7 @@ public sealed class OpcUaClientService : IOpcUaClientService
 
             session.RegisterKeepAliveHandler(isGood =>
             {
-                if (!isGood)
+                if (!isGood) _ = HandleKeepAliveFailureAsync();
-                {
-                    _ = HandleKeepAliveFailureAsync();
-                }
             });
 
             CurrentConnectionInfo = BuildConnectionInfo(session);
@@ -112,11 +113,13 @@ public sealed class OpcUaClientService : IOpcUaClientService
                 await _dataSubscription.DeleteAsync(ct);
                 _dataSubscription = null;
             }
+
             if (_alarmSubscription != null)
             {
                 await _alarmSubscription.DeleteAsync(ct);
                 _alarmSubscription = null;
             }
+
             if (_session != null)
             {
                 await _session.CloseAsync(ct);
@@ -150,7 +153,7 @@ public sealed class OpcUaClientService : IOpcUaClientService
         ThrowIfNotConnected();
 
         // Read current value for type coercion when value is a string
-        object typedValue = value;
+        var typedValue = value;
         if (value is string rawString)
         {
             var currentDataValue = await _session!.ReadValueAsync(nodeId, ct);
@@ -161,14 +164,15 @@ public sealed class OpcUaClientService : IOpcUaClientService
         return await _session!.WriteValueAsync(nodeId, dataValue, ct);
     }
 
-    public async Task<IReadOnlyList<Models.BrowseResult>> BrowseAsync(NodeId? parentNodeId = null, CancellationToken ct = default)
+    public async Task<IReadOnlyList<BrowseResult>> BrowseAsync(NodeId? parentNodeId = null,
+        CancellationToken ct = default)
     {
         ThrowIfDisposed();
         ThrowIfNotConnected();
 
         var startNode = parentNodeId ?? ObjectIds.ObjectsFolder;
         var nodeClassMask = (uint)NodeClass.Object | (uint)NodeClass.Variable | (uint)NodeClass.Method;
-        var results = new List<Models.BrowseResult>();
+        var results = new List<BrowseResult>();
 
         var (continuationPoint, references) = await _session!.BrowseAsync(startNode, nodeClassMask, ct);
 
@@ -180,7 +184,7 @@ public sealed class OpcUaClientService : IOpcUaClientService
                 var hasChildren = reference.NodeClass == NodeClass.Object &&
                                   await _session.HasChildrenAsync(childNodeId, ct);
 
-                results.Add(new Models.BrowseResult(
+                results.Add(new BrowseResult(
                     reference.NodeId.ToString(),
                     reference.DisplayName?.Text ?? string.Empty,
                     reference.NodeClass.ToString(),
@@ -188,14 +192,10 @@ public sealed class OpcUaClientService : IOpcUaClientService
             }
 
             if (continuationPoint != null && continuationPoint.Length > 0)
-            {
                 (continuationPoint, references) = await _session.BrowseNextAsync(continuationPoint, ct);
-            }
             else
-            {
                 break;
         }
-        }
 
         return results;
     }
@@ -209,10 +209,7 @@ public sealed class OpcUaClientService : IOpcUaClientService
         if (_activeDataSubscriptions.ContainsKey(nodeIdStr))
             return; // Already subscribed
 
-        if (_dataSubscription == null)
+        if (_dataSubscription == null) _dataSubscription = await _session!.CreateSubscriptionAsync(intervalMs, ct);
-        {
-            _dataSubscription = await _session!.CreateSubscriptionAsync(intervalMs, ct);
-        }
 
         var handle = await _dataSubscription.AddDataChangeMonitoredItemAsync(
             nodeId, intervalMs, OnDataChangeNotification, ct);
@@ -229,16 +226,14 @@ public sealed class OpcUaClientService : IOpcUaClientService
         if (!_activeDataSubscriptions.TryGetValue(nodeIdStr, out var sub))
             return; // Not subscribed, safe to ignore
 
-        if (_dataSubscription != null)
+        if (_dataSubscription != null) await _dataSubscription.RemoveMonitoredItemAsync(sub.Handle, ct);
-        {
-            await _dataSubscription.RemoveMonitoredItemAsync(sub.Handle, ct);
-        }
 
         _activeDataSubscriptions.Remove(nodeIdStr);
         Logger.Debug("Unsubscribed from data changes on {NodeId}", nodeId);
     }
 
-    public async Task SubscribeAlarmsAsync(NodeId? sourceNodeId = null, int intervalMs = 1000, CancellationToken ct = default)
+    public async Task SubscribeAlarmsAsync(NodeId? sourceNodeId = null, int intervalMs = 1000,
+        CancellationToken ct = default)
     {
         ThrowIfDisposed();
         ThrowIfNotConnected();
@@ -305,16 +300,18 @@ public sealed class OpcUaClientService : IOpcUaClientService
         ThrowIfDisposed();
         ThrowIfNotConnected();
 
-        var redundancySupportValue = await _session!.ReadValueAsync(VariableIds.Server_ServerRedundancy_RedundancySupport, ct);
+        var redundancySupportValue =
+            await _session!.ReadValueAsync(VariableIds.Server_ServerRedundancy_RedundancySupport, ct);
         var redundancyMode = ((RedundancySupport)(int)redundancySupportValue.Value).ToString();
 
         var serviceLevelValue = await _session.ReadValueAsync(VariableIds.Server_ServiceLevel, ct);
         var serviceLevel = (byte)serviceLevelValue.Value;
 
-        string[] serverUris = Array.Empty<string>();
+        string[] serverUris = [];
         try
         {
-            var serverUriArrayValue = await _session.ReadValueAsync(VariableIds.Server_ServerRedundancy_ServerUriArray, ct);
+            var serverUriArrayValue =
+                await _session.ReadValueAsync(VariableIds.Server_ServerRedundancy_ServerUriArray, ct);
             if (serverUriArrayValue.Value is string[] uris)
                 serverUris = uris;
         }
@@ -323,7 +320,7 @@ public sealed class OpcUaClientService : IOpcUaClientService
             // ServerUriArray may not be present when RedundancySupport is None
         }
 
-        string applicationUri = string.Empty;
+        var applicationUri = string.Empty;
         try
         {
             var serverArrayValue = await _session.ReadValueAsync(VariableIds.Server_ServerArray, ct);
@@ -354,7 +351,8 @@ public sealed class OpcUaClientService : IOpcUaClientService
 
     // --- Private helpers ---
 
-    private async Task<ISessionAdapter> ConnectToEndpointAsync(ConnectionSettings settings, string endpointUrl, CancellationToken ct)
+    private async Task<ISessionAdapter> ConnectToEndpointAsync(ConnectionSettings settings, string endpointUrl,
+        CancellationToken ct)
     {
         // Create a settings copy with the current endpoint URL
         var effectiveSettings = new ConnectionSettings
@@ -372,12 +370,13 @@ public sealed class OpcUaClientService : IOpcUaClientService
         var requestedMode = SecurityModeMapper.ToMessageSecurityMode(settings.SecurityMode);
         var endpoint = _endpointDiscovery.SelectEndpoint(config, endpointUrl, requestedMode);
 
-        UserIdentity identity = settings.Username != null
+        var identity = settings.Username != null
-            ? new UserIdentity(settings.Username, System.Text.Encoding.UTF8.GetBytes(settings.Password ?? ""))
+            ? new UserIdentity(settings.Username, Encoding.UTF8.GetBytes(settings.Password ?? ""))
             : new UserIdentity();
 
         var sessionTimeoutMs = (uint)(settings.SessionTimeoutSeconds * 1000);
-        return await _sessionFactory.CreateSessionAsync(config, endpoint, "LmxOpcUaClient", sessionTimeoutMs, identity, ct);
+        return await _sessionFactory.CreateSessionAsync(config, endpoint, "LmxOpcUaClient", sessionTimeoutMs, identity,
+            ct);
     }
 
     private async Task HandleKeepAliveFailureAsync()
@@ -392,9 +391,17 @@ public sealed class OpcUaClientService : IOpcUaClientService
         // Close old session
         if (_session != null)
         {
-            try { _session.Dispose(); } catch { }
+            try
+            {
+                _session.Dispose();
+            }
+            catch
+            {
+            }
+
             _session = null;
         }
+
         _dataSubscription = null;
         _alarmSubscription = null;
 
@@ -405,7 +412,7 @@ public sealed class OpcUaClientService : IOpcUaClientService
         }
 
         // Try each endpoint
-        for (int attempt = 0; attempt < _allEndpointUrls.Length; attempt++)
+        for (var attempt = 0; attempt < _allEndpointUrls.Length; attempt++)
         {
             _currentEndpointIndex = (_currentEndpointIndex + 1) % _allEndpointUrls.Length;
             var url = _allEndpointUrls[_currentEndpointIndex];
@@ -418,7 +425,7 @@ public sealed class OpcUaClientService : IOpcUaClientService
 
                 session.RegisterKeepAliveHandler(isGood =>
                 {
-                    if (!isGood) { _ = HandleKeepAliveFailureAsync(); }
+                    if (!isGood) _ = HandleKeepAliveFailureAsync();
                 });
 
                 CurrentConnectionInfo = BuildConnectionInfo(session);
@@ -448,7 +455,6 @@ public sealed class OpcUaClientService : IOpcUaClientService
             _activeDataSubscriptions.Clear();
 
             foreach (var (nodeIdStr, (nodeId, intervalMs, _)) in subscriptions)
-            {
                 try
                 {
                     if (_dataSubscription == null)
@@ -463,7 +469,6 @@ public sealed class OpcUaClientService : IOpcUaClientService
                     Logger.Warning(ex, "Failed to replay data subscription for {NodeId}", nodeIdStr);
                 }
         }
-        }
 
         // Replay alarm subscription
         if (_activeAlarmSubscription.HasValue)

src/ZB.MOM.WW.LmxOpcUa.Client.Shared/OpcUaClientServiceFactory.cs

@@ -1,7 +1,7 @@
 namespace ZB.MOM.WW.LmxOpcUa.Client.Shared;
 
 /// <summary>
-/// Default factory that creates <see cref="OpcUaClientService"/> instances with production adapters.
+///     Default factory that creates <see cref="OpcUaClientService" /> instances with production adapters.
 /// </summary>
 public sealed class OpcUaClientServiceFactory : IOpcUaClientServiceFactory
 {

src/ZB.MOM.WW.LmxOpcUa.Client.Shared/ZB.MOM.WW.LmxOpcUa.Client.Shared.csproj

@@ -8,12 +8,12 @@
     </PropertyGroup>
 
     <ItemGroup>
-    <PackageReference Include="OPCFoundation.NetStandard.Opc.Ua.Client" Version="1.5.378.106" />
+        <PackageReference Include="OPCFoundation.NetStandard.Opc.Ua.Client" Version="1.5.378.106"/>
-    <PackageReference Include="Serilog" Version="4.2.0" />
+        <PackageReference Include="Serilog" Version="4.2.0"/>
     </ItemGroup>
 
     <ItemGroup>
-    <InternalsVisibleTo Include="ZB.MOM.WW.LmxOpcUa.Client.Shared.Tests" />
+        <InternalsVisibleTo Include="ZB.MOM.WW.LmxOpcUa.Client.Shared.Tests"/>
     </ItemGroup>
 
 </Project>

src/ZB.MOM.WW.LmxOpcUa.Client.UI/App.axaml.cs

@@ -8,7 +8,7 @@ using ZB.MOM.WW.LmxOpcUa.Client.UI.Views;
 
 namespace ZB.MOM.WW.LmxOpcUa.Client.UI;
 
-public partial class App : Application
+public class App : Application
 {
     public override void Initialize()
     {

src/ZB.MOM.WW.LmxOpcUa.Client.UI/Program.cs

@@ -2,15 +2,20 @@ using Avalonia;
 
 namespace ZB.MOM.WW.LmxOpcUa.Client.UI;
 
-class Program
+internal class Program
 {
     [STAThread]
-    public static void Main(string[] args) => BuildAvaloniaApp()
+    public static void Main(string[] args)
+    {
+        BuildAvaloniaApp()
             .StartWithClassicDesktopLifetime(args);
+    }
 
     public static AppBuilder BuildAvaloniaApp()
-        => AppBuilder.Configure<App>()
+    {
+        return AppBuilder.Configure<App>()
             .UsePlatformDetect()
             .WithInterFont()
             .LogToTrace();
+    }
 }

src/ZB.MOM.WW.LmxOpcUa.Client.UI/ViewModels/AlarmEventViewModel.cs

@@ -5,17 +5,8 @@ namespace ZB.MOM.WW.LmxOpcUa.Client.UI.ViewModels;
 /// <summary>
 ///     Represents a single alarm event row.
 /// </summary>
-public partial class AlarmEventViewModel : ObservableObject
+public class AlarmEventViewModel : ObservableObject
 {
-    public string SourceName { get; }
-    public string ConditionName { get; }
-    public ushort Severity { get; }
-    public string Message { get; }
-    public bool Retain { get; }
-    public bool ActiveState { get; }
-    public bool AckedState { get; }
-    public DateTime Time { get; }
-
     public AlarmEventViewModel(
         string sourceName,
         string conditionName,
@@ -35,4 +26,13 @@ public partial class AlarmEventViewModel : ObservableObject
         AckedState = ackedState;
         Time = time;
     }
+
+    public string SourceName { get; }
+    public string ConditionName { get; }
+    public ushort Severity { get; }
+    public string Message { get; }
+    public bool Retain { get; }
+    public bool ActiveState { get; }
+    public bool AckedState { get; }
+    public DateTime Time { get; }
 }

src/ZB.MOM.WW.LmxOpcUa.Client.UI/ViewModels/AlarmsViewModel.cs

@@ -13,23 +13,10 @@ namespace ZB.MOM.WW.LmxOpcUa.Client.UI.ViewModels;
 /// </summary>
 public partial class AlarmsViewModel : ObservableObject
 {
-    private readonly IOpcUaClientService _service;
     private readonly IUiDispatcher _dispatcher;
+    private readonly IOpcUaClientService _service;
 
-    /// <summary>Received alarm events.</summary>
+    [ObservableProperty] private int _interval = 1000;
-    public ObservableCollection<AlarmEventViewModel> AlarmEvents { get; } = new();
-
-    [ObservableProperty]
-    private string? _monitoredNodeIdText;
-
-    [ObservableProperty]
-    private int _interval = 1000;
-
-    [ObservableProperty]
-    [NotifyCanExecuteChangedFor(nameof(SubscribeCommand))]
-    [NotifyCanExecuteChangedFor(nameof(UnsubscribeCommand))]
-    [NotifyCanExecuteChangedFor(nameof(RefreshCommand))]
-    private bool _isSubscribed;
 
     [ObservableProperty]
     [NotifyCanExecuteChangedFor(nameof(SubscribeCommand))]
@@ -37,6 +24,14 @@ public partial class AlarmsViewModel : ObservableObject
     [NotifyCanExecuteChangedFor(nameof(RefreshCommand))]
     private bool _isConnected;
 
+    [ObservableProperty]
+    [NotifyCanExecuteChangedFor(nameof(SubscribeCommand))]
+    [NotifyCanExecuteChangedFor(nameof(UnsubscribeCommand))]
+    [NotifyCanExecuteChangedFor(nameof(RefreshCommand))]
+    private bool _isSubscribed;
+
+    [ObservableProperty] private string? _monitoredNodeIdText;
+
     public AlarmsViewModel(IOpcUaClientService service, IUiDispatcher dispatcher)
     {
         _service = service;
@@ -44,6 +39,9 @@ public partial class AlarmsViewModel : ObservableObject
         _service.AlarmEvent += OnAlarmEvent;
     }
 
+    /// <summary>Received alarm events.</summary>
+    public ObservableCollection<AlarmEventViewModel> AlarmEvents { get; } = [];
+
     private void OnAlarmEvent(object? sender, AlarmEventArgs e)
     {
         _dispatcher.Post(() =>
@@ -60,14 +58,17 @@ public partial class AlarmsViewModel : ObservableObject
         });
     }
 
-    private bool CanSubscribe() => IsConnected && !IsSubscribed;
+    private bool CanSubscribe()
+    {
+        return IsConnected && !IsSubscribed;
+    }
 
     [RelayCommand(CanExecute = nameof(CanSubscribe))]
     private async Task SubscribeAsync()
     {
         try
         {
-            NodeId? sourceNodeId = string.IsNullOrWhiteSpace(MonitoredNodeIdText)
+            var sourceNodeId = string.IsNullOrWhiteSpace(MonitoredNodeIdText)
                 ? null
                 : NodeId.Parse(MonitoredNodeIdText);
 
@@ -80,7 +81,10 @@ public partial class AlarmsViewModel : ObservableObject
         }
     }
 
-    private bool CanUnsubscribe() => IsConnected && IsSubscribed;
+    private bool CanUnsubscribe()
+    {
+        return IsConnected && IsSubscribed;
+    }
 
     [RelayCommand(CanExecute = nameof(CanUnsubscribe))]
     private async Task UnsubscribeAsync()

src/ZB.MOM.WW.LmxOpcUa.Client.UI/ViewModels/BrowseTreeViewModel.cs

@@ -8,13 +8,10 @@ namespace ZB.MOM.WW.LmxOpcUa.Client.UI.ViewModels;
 /// <summary>
 ///     ViewModel for the OPC UA browse tree panel.
 /// </summary>
-public partial class BrowseTreeViewModel : ObservableObject
+public class BrowseTreeViewModel : ObservableObject
 {
-    private readonly IOpcUaClientService _service;
     private readonly IUiDispatcher _dispatcher;
-
+    private readonly IOpcUaClientService _service;
-    /// <summary>Top-level nodes in the browse tree.</summary>
-    public ObservableCollection<TreeNodeViewModel> RootNodes { get; } = new();
 
     public BrowseTreeViewModel(IOpcUaClientService service, IUiDispatcher dispatcher)
     {
@@ -22,18 +19,20 @@ public partial class BrowseTreeViewModel : ObservableObject
         _dispatcher = dispatcher;
     }
 
+    /// <summary>Top-level nodes in the browse tree.</summary>
+    public ObservableCollection<TreeNodeViewModel> RootNodes { get; } = [];
+
     /// <summary>
     ///     Loads root nodes by browsing with a null parent.
     /// </summary>
     public async Task LoadRootsAsync()
     {
-        var results = await _service.BrowseAsync(null);
+        var results = await _service.BrowseAsync();
 
         _dispatcher.Post(() =>
         {
             RootNodes.Clear();
             foreach (var result in results)
-            {
                 RootNodes.Add(new TreeNodeViewModel(
                     result.NodeId,
                     result.DisplayName,
@@ -41,7 +40,6 @@ public partial class BrowseTreeViewModel : ObservableObject
                     result.HasChildren,
                     _service,
                     _dispatcher));
-            }
         });
     }
 

src/ZB.MOM.WW.LmxOpcUa.Client.UI/ViewModels/HistoryValueViewModel.cs

@@ -5,13 +5,8 @@ namespace ZB.MOM.WW.LmxOpcUa.Client.UI.ViewModels;
 /// <summary>
 ///     Represents a single historical value row.
 /// </summary>
-public partial class HistoryValueViewModel : ObservableObject
+public class HistoryValueViewModel : ObservableObject
 {
-    public string Value { get; }
-    public string Status { get; }
-    public string SourceTimestamp { get; }
-    public string ServerTimestamp { get; }
-
     public HistoryValueViewModel(string value, string status, string sourceTimestamp, string serverTimestamp)
     {
         Value = value;
@@ -19,4 +14,9 @@ public partial class HistoryValueViewModel : ObservableObject
         SourceTimestamp = sourceTimestamp;
         ServerTimestamp = serverTimestamp;
     }
+
+    public string Value { get; }
+    public string Status { get; }
+    public string SourceTimestamp { get; }
+    public string ServerTimestamp { get; }
 }

src/ZB.MOM.WW.LmxOpcUa.Client.UI/ViewModels/HistoryViewModel.cs

@@ -13,51 +13,26 @@ namespace ZB.MOM.WW.LmxOpcUa.Client.UI.ViewModels;
 /// </summary>
 public partial class HistoryViewModel : ObservableObject
 {
-    private readonly IOpcUaClientService _service;
     private readonly IUiDispatcher _dispatcher;
+    private readonly IOpcUaClientService _service;
 
-    [ObservableProperty]
+    [ObservableProperty] private DateTimeOffset _endTime = DateTimeOffset.UtcNow;
-    [NotifyCanExecuteChangedFor(nameof(ReadHistoryCommand))]
-    private string? _selectedNodeId;
 
-    [ObservableProperty]
+    [ObservableProperty] private double _intervalMs = 3600000;
-    private DateTimeOffset _startTime = DateTimeOffset.UtcNow.AddHours(-1);
 
-    [ObservableProperty]
+    [ObservableProperty] [NotifyCanExecuteChangedFor(nameof(ReadHistoryCommand))]
-    private DateTimeOffset _endTime = DateTimeOffset.UtcNow;
-
-    [ObservableProperty]
-    private int _maxValues = 1000;
-
-    [ObservableProperty]
-    private AggregateType? _selectedAggregateType;
-
-    /// <summary>Available aggregate types (null means "Raw").</summary>
-    public IReadOnlyList<AggregateType?> AggregateTypes { get; } = new AggregateType?[]
-    {
-        null,
-        AggregateType.Average,
-        AggregateType.Minimum,
-        AggregateType.Maximum,
-        AggregateType.Count,
-        AggregateType.Start,
-        AggregateType.End
-    };
-
-    [ObservableProperty]
-    private double _intervalMs = 3600000;
-
-    public bool IsAggregateRead => SelectedAggregateType != null;
-
-    [ObservableProperty]
-    private bool _isLoading;
-
-    [ObservableProperty]
-    [NotifyCanExecuteChangedFor(nameof(ReadHistoryCommand))]
     private bool _isConnected;
 
-    /// <summary>History read results.</summary>
+    [ObservableProperty] private bool _isLoading;
-    public ObservableCollection<HistoryValueViewModel> Results { get; } = new();
+
+    [ObservableProperty] private int _maxValues = 1000;
+
+    [ObservableProperty] private AggregateType? _selectedAggregateType;
+
+    [ObservableProperty] [NotifyCanExecuteChangedFor(nameof(ReadHistoryCommand))]
+    private string? _selectedNodeId;
+
+    [ObservableProperty] private DateTimeOffset _startTime = DateTimeOffset.UtcNow.AddHours(-1);
 
     public HistoryViewModel(IOpcUaClientService service, IUiDispatcher dispatcher)
     {
@@ -65,12 +40,32 @@ public partial class HistoryViewModel : ObservableObject
         _dispatcher = dispatcher;
     }
 
+    /// <summary>Available aggregate types (null means "Raw").</summary>
+    public IReadOnlyList<AggregateType?> AggregateTypes { get; } =
+    [
+        null,
+        AggregateType.Average,
+        AggregateType.Minimum,
+        AggregateType.Maximum,
+        AggregateType.Count,
+        AggregateType.Start,
+        AggregateType.End
+    ];
+
+    public bool IsAggregateRead => SelectedAggregateType != null;
+
+    /// <summary>History read results.</summary>
+    public ObservableCollection<HistoryValueViewModel> Results { get; } = [];
+
     partial void OnSelectedAggregateTypeChanged(AggregateType? value)
     {
         OnPropertyChanged(nameof(IsAggregateRead));
     }
 
-    private bool CanReadHistory() => IsConnected && !string.IsNullOrEmpty(SelectedNodeId);
+    private bool CanReadHistory()
+    {
+        return IsConnected && !string.IsNullOrEmpty(SelectedNodeId);
+    }
 
     [RelayCommand(CanExecute = nameof(CanReadHistory))]
     private async Task ReadHistoryAsync()
@@ -86,33 +81,27 @@ public partial class HistoryViewModel : ObservableObject
             IReadOnlyList<DataValue> values;
 
             if (SelectedAggregateType != null)
-            {
                 values = await _service.HistoryReadAggregateAsync(
                     nodeId,
                     StartTime.UtcDateTime,
                     EndTime.UtcDateTime,
                     SelectedAggregateType.Value,
                     IntervalMs);
-            }
             else
-            {
                 values = await _service.HistoryReadRawAsync(
                     nodeId,
                     StartTime.UtcDateTime,
                     EndTime.UtcDateTime,
                     MaxValues);
-            }
 
             _dispatcher.Post(() =>
             {
                 foreach (var dv in values)
-                {
                     Results.Add(new HistoryValueViewModel(
                         dv.Value?.ToString() ?? "(null)",
                         dv.StatusCode.ToString(),
                         dv.SourceTimestamp.ToString("O"),
                         dv.ServerTimestamp.ToString("O")));
-                }
             });
         }
         catch (Exception ex)

src/ZB.MOM.WW.LmxOpcUa.Client.UI/ViewModels/MainWindowViewModel.cs

@@ -12,74 +12,45 @@ namespace ZB.MOM.WW.LmxOpcUa.Client.UI.ViewModels;
 /// </summary>
 public partial class MainWindowViewModel : ObservableObject
 {
-    private readonly IOpcUaClientService _service;
     private readonly IUiDispatcher _dispatcher;
+    private readonly IOpcUaClientService _service;
 
-    [ObservableProperty]
+    [ObservableProperty] private bool _autoAcceptCertificates = true;
-    private string _endpointUrl = "opc.tcp://localhost:4840";
 
-    [ObservableProperty]
+    [ObservableProperty] private string _certificateStorePath = Path.Combine(
-    private string? _username;
-
-    [ObservableProperty]
-    private string? _password;
-
-    [ObservableProperty]
-    private SecurityMode _selectedSecurityMode = SecurityMode.None;
-
-    [ObservableProperty]
-    private string? _failoverUrls;
-
-    [ObservableProperty]
-    private int _sessionTimeoutSeconds = 60;
-
-    [ObservableProperty]
-    private bool _autoAcceptCertificates = true;
-
-    [ObservableProperty]
-    private string _certificateStorePath = Path.Combine(
         Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData),
         "LmxOpcUaClient", "pki");
 
-    /// <summary>All available security modes.</summary>
-    public IReadOnlyList<SecurityMode> SecurityModes { get; } = Enum.GetValues<SecurityMode>();
-
     [ObservableProperty]
     [NotifyCanExecuteChangedFor(nameof(ConnectCommand))]
     [NotifyCanExecuteChangedFor(nameof(DisconnectCommand))]
     private ConnectionState _connectionState = ConnectionState.Disconnected;
 
-    public bool IsConnected => ConnectionState == ConnectionState.Connected;
+    [ObservableProperty] private string _endpointUrl = "opc.tcp://localhost:4840";
 
-    [ObservableProperty]
+    [ObservableProperty] private string? _failoverUrls;
-    private TreeNodeViewModel? _selectedTreeNode;
 
-    [ObservableProperty]
+    [ObservableProperty] private bool _isHistoryEnabledForSelection;
-    private RedundancyInfo? _redundancyInfo;
 
-    [ObservableProperty]
+    [ObservableProperty] private string? _password;
-    private string _statusMessage = "Disconnected";
 
-    [ObservableProperty]
+    [ObservableProperty] private RedundancyInfo? _redundancyInfo;
-    private string _sessionLabel = string.Empty;
 
-    [ObservableProperty]
+    [ObservableProperty] private SecurityMode _selectedSecurityMode = SecurityMode.None;
-    private int _subscriptionCount;
 
-    [ObservableProperty]
+    [ObservableProperty] private int _selectedTabIndex;
-    private int _selectedTabIndex;
 
-    [ObservableProperty]
+    [ObservableProperty] private TreeNodeViewModel? _selectedTreeNode;
-    private bool _isHistoryEnabledForSelection;
 
-    /// <summary>The currently selected tree nodes (supports multi-select).</summary>
+    [ObservableProperty] private string _sessionLabel = string.Empty;
-    public ObservableCollection<TreeNodeViewModel> SelectedTreeNodes { get; } = new();
 
-    public BrowseTreeViewModel BrowseTree { get; }
+    [ObservableProperty] private int _sessionTimeoutSeconds = 60;
-    public ReadWriteViewModel ReadWrite { get; }
+
-    public SubscriptionsViewModel Subscriptions { get; }
+    [ObservableProperty] private string _statusMessage = "Disconnected";
-    public AlarmsViewModel Alarms { get; }
+
-    public HistoryViewModel History { get; }
+    [ObservableProperty] private int _subscriptionCount;
+
+    [ObservableProperty] private string? _username;
 
     public MainWindowViewModel(IOpcUaClientServiceFactory factory, IUiDispatcher dispatcher)
     {
@@ -95,12 +66,23 @@ public partial class MainWindowViewModel : ObservableObject
         _service.ConnectionStateChanged += OnConnectionStateChanged;
     }
 
+    /// <summary>All available security modes.</summary>
+    public IReadOnlyList<SecurityMode> SecurityModes { get; } = Enum.GetValues<SecurityMode>();
+
+    public bool IsConnected => ConnectionState == ConnectionState.Connected;
+
+    /// <summary>The currently selected tree nodes (supports multi-select).</summary>
+    public ObservableCollection<TreeNodeViewModel> SelectedTreeNodes { get; } = [];
+
+    public BrowseTreeViewModel BrowseTree { get; }
+    public ReadWriteViewModel ReadWrite { get; }
+    public SubscriptionsViewModel Subscriptions { get; }
+    public AlarmsViewModel Alarms { get; }
+    public HistoryViewModel History { get; }
+
     private void OnConnectionStateChanged(object? sender, ConnectionStateChangedEventArgs e)
     {
-        _dispatcher.Post(() =>
+        _dispatcher.Post(() => { ConnectionState = e.NewState; });
-        {
-            ConnectionState = e.NewState;
-        });
     }
 
     partial void OnConnectionStateChanged(ConnectionState value)
@@ -144,7 +126,10 @@ public partial class MainWindowViewModel : ObservableObject
         History.SelectedNodeId = value?.NodeId;
     }
 
-    private bool CanConnect() => ConnectionState == ConnectionState.Disconnected;
+    private bool CanConnect()
+    {
+        return ConnectionState == ConnectionState.Disconnected;
+    }
 
     [RelayCommand(CanExecute = nameof(CanConnect))]
     private async Task ConnectAsync()
@@ -199,8 +184,11 @@ public partial class MainWindowViewModel : ObservableObject
         }
     }
 
-    private bool CanDisconnect() => ConnectionState == ConnectionState.Connected
+    private bool CanDisconnect()
+    {
+        return ConnectionState == ConnectionState.Connected
                || ConnectionState == ConnectionState.Reconnecting;
+    }
 
     [RelayCommand(CanExecute = nameof(CanDisconnect))]
     private async Task DisconnectAsync()
@@ -217,10 +205,7 @@ public partial class MainWindowViewModel : ObservableObject
         }
         finally
         {
-            _dispatcher.Post(() =>
+            _dispatcher.Post(() => { ConnectionState = ConnectionState.Disconnected; });
-            {
-                ConnectionState = ConnectionState.Disconnected;
-            });
         }
     }
 
@@ -233,10 +218,7 @@ public partial class MainWindowViewModel : ObservableObject
         if (SelectedTreeNodes.Count == 0 || !IsConnected) return;
 
         var nodes = SelectedTreeNodes.ToList();
-        foreach (var node in nodes)
+        foreach (var node in nodes) await Subscriptions.AddSubscriptionForNodeAsync(node.NodeId);
-        {
-            await Subscriptions.AddSubscriptionForNodeAsync(node.NodeId);
-        }
 
         SubscriptionCount = Subscriptions.SubscriptionCount;
         SelectedTabIndex = 1; // Subscriptions tab

src/ZB.MOM.WW.LmxOpcUa.Client.UI/ViewModels/ReadWriteViewModel.cs

@@ -11,38 +11,30 @@ namespace ZB.MOM.WW.LmxOpcUa.Client.UI.ViewModels;
 /// </summary>
 public partial class ReadWriteViewModel : ObservableObject
 {
-    private readonly IOpcUaClientService _service;
     private readonly IUiDispatcher _dispatcher;
+    private readonly IOpcUaClientService _service;
 
-    [ObservableProperty]
+    [ObservableProperty] private string? _currentStatus;
-    [NotifyCanExecuteChangedFor(nameof(ReadCommand))]
-    [NotifyCanExecuteChangedFor(nameof(WriteCommand))]
-    private string? _selectedNodeId;
 
-    [ObservableProperty]
+    [ObservableProperty] private string? _currentValue;
-    private string? _currentValue;
-
-    [ObservableProperty]
-    private string? _currentStatus;
-
-    [ObservableProperty]
-    private string? _sourceTimestamp;
-
-    [ObservableProperty]
-    private string? _serverTimestamp;
-
-    [ObservableProperty]
-    private string? _writeValue;
-
-    [ObservableProperty]
-    private string? _writeStatus;
 
     [ObservableProperty]
     [NotifyCanExecuteChangedFor(nameof(ReadCommand))]
     [NotifyCanExecuteChangedFor(nameof(WriteCommand))]
     private bool _isConnected;
 
-    public bool IsNodeSelected => !string.IsNullOrEmpty(SelectedNodeId);
+    [ObservableProperty]
+    [NotifyCanExecuteChangedFor(nameof(ReadCommand))]
+    [NotifyCanExecuteChangedFor(nameof(WriteCommand))]
+    private string? _selectedNodeId;
+
+    [ObservableProperty] private string? _serverTimestamp;
+
+    [ObservableProperty] private string? _sourceTimestamp;
+
+    [ObservableProperty] private string? _writeStatus;
+
+    [ObservableProperty] private string? _writeValue;
 
     public ReadWriteViewModel(IOpcUaClientService service, IUiDispatcher dispatcher)
     {
@@ -50,16 +42,18 @@ public partial class ReadWriteViewModel : ObservableObject
         _dispatcher = dispatcher;
     }
 
+    public bool IsNodeSelected => !string.IsNullOrEmpty(SelectedNodeId);
+
     partial void OnSelectedNodeIdChanged(string? value)
     {
         OnPropertyChanged(nameof(IsNodeSelected));
-        if (!string.IsNullOrEmpty(value) && IsConnected)
+        if (!string.IsNullOrEmpty(value) && IsConnected) _ = ExecuteReadAsync();
-        {
-            _ = ExecuteReadAsync();
-        }
     }
 
-    private bool CanReadOrWrite() => IsConnected && !string.IsNullOrEmpty(SelectedNodeId);
+    private bool CanReadOrWrite()
+    {
+        return IsConnected && !string.IsNullOrEmpty(SelectedNodeId);
+    }
 
     [RelayCommand(CanExecute = nameof(CanReadOrWrite))]
     private async Task ReadAsync()
@@ -106,17 +100,11 @@ public partial class ReadWriteViewModel : ObservableObject
             var nodeId = NodeId.Parse(SelectedNodeId);
             var statusCode = await _service.WriteValueAsync(nodeId, WriteValue);
 
-            _dispatcher.Post(() =>
+            _dispatcher.Post(() => { WriteStatus = statusCode.ToString(); });
-            {
-                WriteStatus = statusCode.ToString();
-            });
         }
         catch (Exception ex)
         {
-            _dispatcher.Post(() =>
+            _dispatcher.Post(() => { WriteStatus = $"Error: {ex.Message}"; });
-            {
-                WriteStatus = $"Error: {ex.Message}";
-            });
         }
     }
 

src/ZB.MOM.WW.LmxOpcUa.Client.UI/ViewModels/SubscriptionItemViewModel.cs

@@ -7,24 +7,21 @@ namespace ZB.MOM.WW.LmxOpcUa.Client.UI.ViewModels;
 /// </summary>
 public partial class SubscriptionItemViewModel : ObservableObject
 {
-    /// <summary>The monitored NodeId.</summary>
+    [ObservableProperty] private string? _status;
-    public string NodeId { get; }
 
-    /// <summary>The subscription interval in milliseconds.</summary>
+    [ObservableProperty] private string? _timestamp;
-    public int IntervalMs { get; }
 
-    [ObservableProperty]
+    [ObservableProperty] private string? _value;
-    private string? _value;
-
-    [ObservableProperty]
-    private string? _status;
-
-    [ObservableProperty]
-    private string? _timestamp;
 
     public SubscriptionItemViewModel(string nodeId, int intervalMs)
     {
         NodeId = nodeId;
         IntervalMs = intervalMs;
     }
+
+    /// <summary>The monitored NodeId.</summary>
+    public string NodeId { get; }
+
+    /// <summary>The subscription interval in milliseconds.</summary>
+    public int IntervalMs { get; }
 }

src/ZB.MOM.WW.LmxOpcUa.Client.UI/ViewModels/SubscriptionsViewModel.cs

@@ -13,31 +13,24 @@ namespace ZB.MOM.WW.LmxOpcUa.Client.UI.ViewModels;
 /// </summary>
 public partial class SubscriptionsViewModel : ObservableObject
 {
-    private readonly IOpcUaClientService _service;
     private readonly IUiDispatcher _dispatcher;
-
+    private readonly IOpcUaClientService _service;
-    /// <summary>Currently active subscriptions.</summary>
-    public ObservableCollection<SubscriptionItemViewModel> ActiveSubscriptions { get; } = new();
-
-    [ObservableProperty]
-    [NotifyCanExecuteChangedFor(nameof(AddSubscriptionCommand))]
-    private string? _newNodeIdText;
-
-    [ObservableProperty]
-    private int _newInterval = 1000;
 
     [ObservableProperty]
     [NotifyCanExecuteChangedFor(nameof(AddSubscriptionCommand))]
     [NotifyCanExecuteChangedFor(nameof(RemoveSubscriptionCommand))]
     private bool _isConnected;
 
-    [ObservableProperty]
+    [ObservableProperty] private int _newInterval = 1000;
-    private int _subscriptionCount;
 
-    [ObservableProperty]
+    [ObservableProperty] [NotifyCanExecuteChangedFor(nameof(AddSubscriptionCommand))]
-    [NotifyCanExecuteChangedFor(nameof(RemoveSubscriptionCommand))]
+    private string? _newNodeIdText;
+
+    [ObservableProperty] [NotifyCanExecuteChangedFor(nameof(RemoveSubscriptionCommand))]
     private SubscriptionItemViewModel? _selectedSubscription;
 
+    [ObservableProperty] private int _subscriptionCount;
+
     public SubscriptionsViewModel(IOpcUaClientService service, IUiDispatcher dispatcher)
     {
         _service = service;
@@ -45,23 +38,27 @@ public partial class SubscriptionsViewModel : ObservableObject
         _service.DataChanged += OnDataChanged;
     }
 
+    /// <summary>Currently active subscriptions.</summary>
+    public ObservableCollection<SubscriptionItemViewModel> ActiveSubscriptions { get; } = [];
+
     private void OnDataChanged(object? sender, DataChangedEventArgs e)
     {
         _dispatcher.Post(() =>
         {
             foreach (var item in ActiveSubscriptions)
-            {
                 if (item.NodeId == e.NodeId)
                 {
                     item.Value = e.Value.Value?.ToString() ?? "(null)";
                     item.Status = e.Value.StatusCode.ToString();
                     item.Timestamp = e.Value.SourceTimestamp.ToString("O");
                 }
-            }
         });
     }
 
-    private bool CanAddSubscription() => IsConnected && !string.IsNullOrWhiteSpace(NewNodeIdText);
+    private bool CanAddSubscription()
+    {
+        return IsConnected && !string.IsNullOrWhiteSpace(NewNodeIdText);
+    }
 
     [RelayCommand(CanExecute = nameof(CanAddSubscription))]
     private async Task AddSubscriptionAsync()
@@ -88,7 +85,10 @@ public partial class SubscriptionsViewModel : ObservableObject
         }
     }
 
-    private bool CanRemoveSubscription() => IsConnected && SelectedSubscription != null;
+    private bool CanRemoveSubscription()
+    {
+        return IsConnected && SelectedSubscription != null;
+    }
 
     [RelayCommand(CanExecute = nameof(CanRemoveSubscription))]
     private async Task RemoveSubscriptionAsync()

src/ZB.MOM.WW.LmxOpcUa.Client.UI/ViewModels/TreeNodeViewModel.cs

@@ -1,6 +1,5 @@
 using System.Collections.ObjectModel;
 using CommunityToolkit.Mvvm.ComponentModel;
-using Opc.Ua;
 using ZB.MOM.WW.LmxOpcUa.Client.Shared;
 using ZB.MOM.WW.LmxOpcUa.Client.UI.Services;
 
@@ -12,31 +11,14 @@ namespace ZB.MOM.WW.LmxOpcUa.Client.UI.ViewModels;
 public partial class TreeNodeViewModel : ObservableObject
 {
     private static readonly TreeNodeViewModel PlaceholderSentinel = new();
+    private readonly IUiDispatcher? _dispatcher;
 
     private readonly IOpcUaClientService? _service;
-    private readonly IUiDispatcher? _dispatcher;
     private bool _hasLoadedChildren;
 
-    /// <summary>The string NodeId of this node.</summary>
+    [ObservableProperty] private bool _isExpanded;
-    public string NodeId { get; }
 
-    /// <summary>The display name shown in the tree.</summary>
+    [ObservableProperty] private bool _isLoading;
-    public string DisplayName { get; }
-
-    /// <summary>The OPC UA node class (Object, Variable, etc.).</summary>
-    public string NodeClass { get; }
-
-    /// <summary>Whether this node has child references.</summary>
-    public bool HasChildren { get; }
-
-    /// <summary>Child nodes (may contain a placeholder sentinel before first expand).</summary>
-    public ObservableCollection<TreeNodeViewModel> Children { get; } = new();
-
-    [ObservableProperty]
-    private bool _isExpanded;
-
-    [ObservableProperty]
-    private bool _isLoading;
 
     /// <summary>
     ///     Private constructor for the placeholder sentinel only.
@@ -64,18 +46,32 @@ public partial class TreeNodeViewModel : ObservableObject
         _service = service;
         _dispatcher = dispatcher;
 
-        if (hasChildren)
+        if (hasChildren) Children.Add(PlaceholderSentinel);
-        {
-            Children.Add(PlaceholderSentinel);
-        }
     }
 
+    /// <summary>The string NodeId of this node.</summary>
+    public string NodeId { get; }
+
+    /// <summary>The display name shown in the tree.</summary>
+    public string DisplayName { get; }
+
+    /// <summary>The OPC UA node class (Object, Variable, etc.).</summary>
+    public string NodeClass { get; }
+
+    /// <summary>Whether this node has child references.</summary>
+    public bool HasChildren { get; }
+
+    /// <summary>Child nodes (may contain a placeholder sentinel before first expand).</summary>
+    public ObservableCollection<TreeNodeViewModel> Children { get; } = [];
+
+    /// <summary>
+    ///     Returns whether this node instance is the placeholder sentinel.
+    /// </summary>
+    internal bool IsPlaceholder => ReferenceEquals(this, PlaceholderSentinel);
+
     partial void OnIsExpandedChanged(bool value)
     {
-        if (value && !_hasLoadedChildren && HasChildren)
+        if (value && !_hasLoadedChildren && HasChildren) _ = LoadChildrenAsync();
-        {
-            _ = LoadChildrenAsync();
-        }
     }
 
     private async Task LoadChildrenAsync()
@@ -94,7 +90,6 @@ public partial class TreeNodeViewModel : ObservableObject
             {
                 Children.Clear();
                 foreach (var result in results)
-                {
                     Children.Add(new TreeNodeViewModel(
                         result.NodeId,
                         result.DisplayName,
@@ -102,7 +97,6 @@ public partial class TreeNodeViewModel : ObservableObject
                         result.HasChildren,
                         _service,
                         _dispatcher));
-                }
             });
         }
         catch
@@ -114,9 +108,4 @@ public partial class TreeNodeViewModel : ObservableObject
             _dispatcher.Post(() => IsLoading = false);
         }
     }
-
-    /// <summary>
-    /// Returns whether this node instance is the placeholder sentinel.
-    /// </summary>
-    internal bool IsPlaceholder => ReferenceEquals(this, PlaceholderSentinel);
 }

src/ZB.MOM.WW.LmxOpcUa.Client.UI/Views/MainWindow.axaml.cs

@@ -1,3 +1,4 @@
+using System.ComponentModel;
 using Avalonia.Controls;
 using Avalonia.Interactivity;
 using ZB.MOM.WW.LmxOpcUa.Client.UI.ViewModels;
@@ -17,17 +18,11 @@ public partial class MainWindow : Window
 
         var browseTreeView = this.FindControl<BrowseTreeView>("BrowseTreePanel");
         var treeView = browseTreeView?.FindControl<TreeView>("BrowseTree");
-        if (treeView != null)
+        if (treeView != null) treeView.SelectionChanged += OnTreeSelectionChanged;
-        {
-            treeView.SelectionChanged += OnTreeSelectionChanged;
-        }
 
         // Wire up context menu opening to sync selection and check history
         var contextMenu = this.FindControl<ContextMenu>("TreeContextMenu");
-        if (contextMenu != null)
+        if (contextMenu != null) contextMenu.Opening += OnTreeContextMenuOpening;
-        {
-            contextMenu.Opening += OnTreeContextMenuOpening;
-        }
     }
 
     private void OnTreeSelectionChanged(object? sender, SelectionChangedEventArgs e)
@@ -40,19 +35,12 @@ public partial class MainWindow : Window
         // Sync multi-selection collection
         vm.SelectedTreeNodes.Clear();
         foreach (var item in treeView.SelectedItems)
-        {
             if (item is TreeNodeViewModel node)
-            {
                 vm.SelectedTreeNodes.Add(node);
     }
-        }
-    }
 
-    private void OnTreeContextMenuOpening(object? sender, System.ComponentModel.CancelEventArgs e)
+    private void OnTreeContextMenuOpening(object? sender, CancelEventArgs e)
     {
-        if (DataContext is MainWindowViewModel vm)
+        if (DataContext is MainWindowViewModel vm) vm.UpdateHistoryEnabledForSelection();
-        {
-            vm.UpdateHistoryEnabledForSelection();
-        }
     }
 }

src/ZB.MOM.WW.LmxOpcUa.Client.UI/ZB.MOM.WW.LmxOpcUa.Client.UI.csproj

@@ -9,22 +9,22 @@
     </PropertyGroup>
 
     <ItemGroup>
-    <PackageReference Include="Avalonia" Version="11.2.7" />
+        <PackageReference Include="Avalonia" Version="11.2.7"/>
-    <PackageReference Include="Avalonia.Desktop" Version="11.2.7" />
+        <PackageReference Include="Avalonia.Desktop" Version="11.2.7"/>
-    <PackageReference Include="Avalonia.Themes.Fluent" Version="11.2.7" />
+        <PackageReference Include="Avalonia.Themes.Fluent" Version="11.2.7"/>
-    <PackageReference Include="Avalonia.Fonts.Inter" Version="11.2.7" />
+        <PackageReference Include="Avalonia.Fonts.Inter" Version="11.2.7"/>
-    <PackageReference Include="Avalonia.Controls.DataGrid" Version="11.2.7" />
+        <PackageReference Include="Avalonia.Controls.DataGrid" Version="11.2.7"/>
-    <PackageReference Include="CommunityToolkit.Mvvm" Version="8.4.0" />
+        <PackageReference Include="CommunityToolkit.Mvvm" Version="8.4.0"/>
-    <PackageReference Include="Serilog" Version="4.2.0" />
+        <PackageReference Include="Serilog" Version="4.2.0"/>
-    <PackageReference Include="Serilog.Sinks.Console" Version="6.0.0" />
+        <PackageReference Include="Serilog.Sinks.Console" Version="6.0.0"/>
     </ItemGroup>
 
     <ItemGroup>
-    <ProjectReference Include="..\ZB.MOM.WW.LmxOpcUa.Client.Shared\ZB.MOM.WW.LmxOpcUa.Client.Shared.csproj" />
+        <ProjectReference Include="..\ZB.MOM.WW.LmxOpcUa.Client.Shared\ZB.MOM.WW.LmxOpcUa.Client.Shared.csproj"/>
     </ItemGroup>
 
     <ItemGroup>
-    <InternalsVisibleTo Include="ZB.MOM.WW.LmxOpcUa.Client.UI.Tests" />
+        <InternalsVisibleTo Include="ZB.MOM.WW.LmxOpcUa.Client.UI.Tests"/>
     </ItemGroup>
 
 </Project>

src/ZB.MOM.WW.LmxOpcUa.Host/Configuration/AppConfiguration.cs

@@ -8,41 +8,41 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.Configuration
         /// <summary>
         ///     Gets or sets the OPC UA endpoint settings exposed to downstream clients that browse the LMX address space.
         /// </summary>
-        public OpcUaConfiguration OpcUa { get; set; } = new OpcUaConfiguration();
+        public OpcUaConfiguration OpcUa { get; set; } = new();
 
         /// <summary>
         ///     Gets or sets the MXAccess runtime connection settings used to read and write live Galaxy attributes.
         /// </summary>
-        public MxAccessConfiguration MxAccess { get; set; } = new MxAccessConfiguration();
+        public MxAccessConfiguration MxAccess { get; set; } = new();
 
         /// <summary>
         ///     Gets or sets the repository settings used to query Galaxy metadata for address-space construction.
         /// </summary>
-        public GalaxyRepositoryConfiguration GalaxyRepository { get; set; } = new GalaxyRepositoryConfiguration();
+        public GalaxyRepositoryConfiguration GalaxyRepository { get; set; } = new();
 
         /// <summary>
         ///     Gets or sets the embedded dashboard settings used to surface service health to operators.
         /// </summary>
-        public DashboardConfiguration Dashboard { get; set; } = new DashboardConfiguration();
+        public DashboardConfiguration Dashboard { get; set; } = new();
 
         /// <summary>
         ///     Gets or sets the Wonderware Historian connection settings used to serve OPC UA historical data.
         /// </summary>
-        public HistorianConfiguration Historian { get; set; } = new HistorianConfiguration();
+        public HistorianConfiguration Historian { get; set; } = new();
 
         /// <summary>
         ///     Gets or sets the authentication and role-based access control settings.
         /// </summary>
-        public AuthenticationConfiguration Authentication { get; set; } = new AuthenticationConfiguration();
+        public AuthenticationConfiguration Authentication { get; set; } = new();
 
         /// <summary>
         ///     Gets or sets the transport security settings that control which OPC UA security profiles are exposed.
         /// </summary>
-        public SecurityProfileConfiguration Security { get; set; } = new SecurityProfileConfiguration();
+        public SecurityProfileConfiguration Security { get; set; } = new();
 
         /// <summary>
         ///     Gets or sets the redundancy settings that control how this server participates in a redundant pair.
         /// </summary>
-        public RedundancyConfiguration Redundancy { get; set; } = new RedundancyConfiguration();
+        public RedundancyConfiguration Redundancy { get; set; } = new();
     }
 }

src/ZB.MOM.WW.LmxOpcUa.Host/Configuration/AuthenticationConfiguration.cs

@@ -20,6 +20,6 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.Configuration
         ///     Gets or sets the LDAP authentication settings. When Ldap.Enabled is true,
         ///     credentials are validated against the LDAP server and group membership determines permissions.
         /// </summary>
-        public LdapConfiguration Ldap { get; set; } = new LdapConfiguration();
+        public LdapConfiguration Ldap { get; set; } = new();
     }
 }

src/ZB.MOM.WW.LmxOpcUa.Host/Configuration/ConfigurationValidator.cs

@@ -1,4 +1,6 @@
+using System;
 using System.Linq;
+using Opc.Ua;
 using Serilog;
 using ZB.MOM.WW.LmxOpcUa.Host.OpcUa;
 
@@ -12,19 +14,28 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.Configuration
         private static readonly ILogger Log = Serilog.Log.ForContext(typeof(ConfigurationValidator));
 
         /// <summary>
-        /// Validates the effective host configuration and writes the resolved values to the startup log before service initialization continues.
+        ///     Validates the effective host configuration and writes the resolved values to the startup log before service
+        ///     initialization continues.
         /// </summary>
-        /// <param name="config">The bound service configuration that drives OPC UA hosting, MXAccess connectivity, Galaxy queries, and dashboard behavior.</param>
+        /// <param name="config">
-        /// <returns><see langword="true"/> when the required settings are present and within supported bounds; otherwise, <see langword="false"/>.</returns>
+        ///     The bound service configuration that drives OPC UA hosting, MXAccess connectivity, Galaxy queries,
+        ///     and dashboard behavior.
+        /// </param>
+        /// <returns>
+        ///     <see langword="true" /> when the required settings are present and within supported bounds; otherwise,
+        ///     <see langword="false" />.
+        /// </returns>
         public static bool ValidateAndLog(AppConfiguration config)
         {
-            bool valid = true;
+            var valid = true;
 
             Log.Information("=== Effective Configuration ===");
 
             // OPC UA
-            Log.Information("OpcUa.BindAddress={BindAddress}, Port={Port}, EndpointPath={EndpointPath}, ServerName={ServerName}, GalaxyName={GalaxyName}",
+            Log.Information(
-                config.OpcUa.BindAddress, config.OpcUa.Port, config.OpcUa.EndpointPath, config.OpcUa.ServerName, config.OpcUa.GalaxyName);
+                "OpcUa.BindAddress={BindAddress}, Port={Port}, EndpointPath={EndpointPath}, ServerName={ServerName}, GalaxyName={GalaxyName}",
+                config.OpcUa.BindAddress, config.OpcUa.Port, config.OpcUa.EndpointPath, config.OpcUa.ServerName,
+                config.OpcUa.GalaxyName);
             Log.Information("OpcUa.MaxSessions={MaxSessions}, SessionTimeoutMinutes={SessionTimeout}",
                 config.OpcUa.MaxSessions, config.OpcUa.SessionTimeoutMinutes);
 
@@ -41,10 +52,12 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.Configuration
             }
 
             // MxAccess
-            Log.Information("MxAccess.ClientName={ClientName}, ReadTimeout={ReadTimeout}s, WriteTimeout={WriteTimeout}s, MaxConcurrent={MaxConcurrent}",
+            Log.Information(
+                "MxAccess.ClientName={ClientName}, ReadTimeout={ReadTimeout}s, WriteTimeout={WriteTimeout}s, MaxConcurrent={MaxConcurrent}",
                 config.MxAccess.ClientName, config.MxAccess.ReadTimeoutSeconds, config.MxAccess.WriteTimeoutSeconds,
                 config.MxAccess.MaxConcurrentOperations);
-            Log.Information("MxAccess.MonitorInterval={MonitorInterval}s, AutoReconnect={AutoReconnect}, ProbeTag={ProbeTag}, ProbeStaleThreshold={ProbeStale}s",
+            Log.Information(
+                "MxAccess.MonitorInterval={MonitorInterval}s, AutoReconnect={AutoReconnect}, ProbeTag={ProbeTag}, ProbeStaleThreshold={ProbeStale}s",
                 config.MxAccess.MonitorIntervalSeconds, config.MxAccess.AutoReconnect,
                 config.MxAccess.ProbeTag ?? "(none)", config.MxAccess.ProbeStaleThresholdSeconds);
 
@@ -55,7 +68,8 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.Configuration
             }
 
             // Galaxy Repository
-            Log.Information("GalaxyRepository.ConnectionString={ConnectionString}, ChangeDetectionInterval={ChangeInterval}s, CommandTimeout={CmdTimeout}s, ExtendedAttributes={ExtendedAttributes}",
+            Log.Information(
+                "GalaxyRepository.ConnectionString={ConnectionString}, ChangeDetectionInterval={ChangeInterval}s, CommandTimeout={CmdTimeout}s, ExtendedAttributes={ExtendedAttributes}",
                 config.GalaxyRepository.ConnectionString, config.GalaxyRepository.ChangeDetectionIntervalSeconds,
                 config.GalaxyRepository.CommandTimeoutSeconds, config.GalaxyRepository.ExtendedAttributes);
 
@@ -70,7 +84,8 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.Configuration
                 config.Dashboard.Enabled, config.Dashboard.Port, config.Dashboard.RefreshIntervalSeconds);
 
             // Security
-            Log.Information("Security.Profiles=[{Profiles}], AutoAcceptClientCertificates={AutoAccept}, RejectSHA1={RejectSHA1}, MinKeySize={MinKeySize}",
+            Log.Information(
+                "Security.Profiles=[{Profiles}], AutoAcceptClientCertificates={AutoAccept}, RejectSHA1={RejectSHA1}, MinKeySize={MinKeySize}",
                 string.Join(", ", config.Security.Profiles), config.Security.AutoAcceptClientCertificates,
                 config.Security.RejectSHA1Certificates, config.Security.MinimumCertificateKeySize);
 
@@ -80,13 +95,11 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.Configuration
                 Log.Information("Security.CertificateSubject={CertificateSubject}", config.Security.CertificateSubject);
 
             var unknownProfiles = config.Security.Profiles
-                .Where(p => !SecurityProfileResolver.ValidProfileNames.Contains(p, System.StringComparer.OrdinalIgnoreCase))
+                .Where(p => !SecurityProfileResolver.ValidProfileNames.Contains(p, StringComparer.OrdinalIgnoreCase))
                 .ToList();
             if (unknownProfiles.Count > 0)
-            {
                 Log.Warning("Unknown security profile(s): {Profiles}. Valid values: {ValidProfiles}",
                     string.Join(", ", unknownProfiles), string.Join(", ", SecurityProfileResolver.ValidProfileNames));
-            }
 
             if (config.Security.MinimumCertificateKeySize < 2048)
             {
@@ -95,14 +108,12 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.Configuration
             }
 
             if (config.Security.AutoAcceptClientCertificates)
-            {
+                Log.Warning(
-                Log.Warning("Security.AutoAcceptClientCertificates is enabled — client certificate trust is not enforced. Set to false in production");
+                    "Security.AutoAcceptClientCertificates is enabled — client certificate trust is not enforced. Set to false in production");
-            }
 
-            if (config.Security.Profiles.Count == 1 && config.Security.Profiles[0].Equals("None", System.StringComparison.OrdinalIgnoreCase))
+            if (config.Security.Profiles.Count == 1 &&
-            {
+                config.Security.Profiles[0].Equals("None", StringComparison.OrdinalIgnoreCase))
                 Log.Warning("Only the 'None' security profile is configured — transport security is disabled");
-            }
 
             // Authentication
             Log.Information("Authentication.AllowAnonymous={AllowAnonymous}, AnonymousCanWrite={AnonymousCanWrite}",
@@ -111,51 +122,53 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.Configuration
             if (config.Authentication.Ldap.Enabled)
             {
                 Log.Information("Authentication.Ldap.Enabled=true, Host={Host}, Port={Port}, BaseDN={BaseDN}",
-                    config.Authentication.Ldap.Host, config.Authentication.Ldap.Port, config.Authentication.Ldap.BaseDN);
+                    config.Authentication.Ldap.Host, config.Authentication.Ldap.Port,
-                Log.Information("Authentication.Ldap groups: ReadOnly={ReadOnly}, WriteOperate={WriteOperate}, WriteTune={WriteTune}, WriteConfigure={WriteConfigure}, AlarmAck={AlarmAck}",
+                    config.Authentication.Ldap.BaseDN);
+                Log.Information(
+                    "Authentication.Ldap groups: ReadOnly={ReadOnly}, WriteOperate={WriteOperate}, WriteTune={WriteTune}, WriteConfigure={WriteConfigure}, AlarmAck={AlarmAck}",
                     config.Authentication.Ldap.ReadOnlyGroup, config.Authentication.Ldap.WriteOperateGroup,
                     config.Authentication.Ldap.WriteTuneGroup, config.Authentication.Ldap.WriteConfigureGroup,
                     config.Authentication.Ldap.AlarmAckGroup);
 
                 if (string.IsNullOrWhiteSpace(config.Authentication.Ldap.ServiceAccountDn))
-                {
                     Log.Warning("Authentication.Ldap.ServiceAccountDn is empty — group lookups will fail");
             }
-            }
 
             // Redundancy
             if (config.OpcUa.ApplicationUri != null)
                 Log.Information("OpcUa.ApplicationUri={ApplicationUri}", config.OpcUa.ApplicationUri);
 
-            Log.Information("Redundancy.Enabled={Enabled}, Mode={Mode}, Role={Role}, ServiceLevelBase={ServiceLevelBase}",
+            Log.Information(
-                config.Redundancy.Enabled, config.Redundancy.Mode, config.Redundancy.Role, config.Redundancy.ServiceLevelBase);
+                "Redundancy.Enabled={Enabled}, Mode={Mode}, Role={Role}, ServiceLevelBase={ServiceLevelBase}",
+                config.Redundancy.Enabled, config.Redundancy.Mode, config.Redundancy.Role,
+                config.Redundancy.ServiceLevelBase);
 
             if (config.Redundancy.ServerUris.Count > 0)
-                Log.Information("Redundancy.ServerUris=[{ServerUris}]", string.Join(", ", config.Redundancy.ServerUris));
+                Log.Information("Redundancy.ServerUris=[{ServerUris}]",
+                    string.Join(", ", config.Redundancy.ServerUris));
 
             if (config.Redundancy.Enabled)
             {
                 if (string.IsNullOrWhiteSpace(config.OpcUa.ApplicationUri))
                 {
-                    Log.Error("OpcUa.ApplicationUri must be set when redundancy is enabled — each instance needs a unique identity");
+                    Log.Error(
+                        "OpcUa.ApplicationUri must be set when redundancy is enabled — each instance needs a unique identity");
                     valid = false;
                 }
 
                 if (config.Redundancy.ServerUris.Count < 2)
-                {
+                    Log.Warning(
-                    Log.Warning("Redundancy.ServerUris contains fewer than 2 entries — a redundant set typically has at least 2 servers");
+                        "Redundancy.ServerUris contains fewer than 2 entries — a redundant set typically has at least 2 servers");
-                }
 
-                if (config.OpcUa.ApplicationUri != null && !config.Redundancy.ServerUris.Contains(config.OpcUa.ApplicationUri))
+                if (config.OpcUa.ApplicationUri != null &&
-                {
+                    !config.Redundancy.ServerUris.Contains(config.OpcUa.ApplicationUri))
-                    Log.Warning("Local OpcUa.ApplicationUri '{ApplicationUri}' is not listed in Redundancy.ServerUris", config.OpcUa.ApplicationUri);
+                    Log.Warning("Local OpcUa.ApplicationUri '{ApplicationUri}' is not listed in Redundancy.ServerUris",
-                }
+                        config.OpcUa.ApplicationUri);
 
                 var mode = RedundancyModeResolver.Resolve(config.Redundancy.Mode, true);
-                if (mode == Opc.Ua.RedundancySupport.None)
+                if (mode == RedundancySupport.None)
-                {
+                    Log.Warning("Redundancy is enabled but Mode '{Mode}' is not recognized — will fall back to None",
-                    Log.Warning("Redundancy is enabled but Mode '{Mode}' is not recognized — will fall back to None", config.Redundancy.Mode);
+                        config.Redundancy.Mode);
-                }
             }
 
             if (config.Redundancy.ServiceLevelBase < 1 || config.Redundancy.ServiceLevelBase > 255)

src/ZB.MOM.WW.LmxOpcUa.Host/Configuration/GalaxyRepositoryConfiguration.cs

@@ -11,7 +11,8 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.Configuration
         public string ConnectionString { get; set; } = "Server=localhost;Database=ZB;Integrated Security=true;";
 
         /// <summary>
-        /// Gets or sets how often, in seconds, the service polls for Galaxy deploy changes that require an address-space rebuild.
+        ///     Gets or sets how often, in seconds, the service polls for Galaxy deploy changes that require an address-space
+        ///     rebuild.
         /// </summary>
         public int ChangeDetectionIntervalSeconds { get; set; } = 30;
 

src/ZB.MOM.WW.LmxOpcUa.Host/Configuration/LdapConfiguration.cs

@@ -1,5 +1,3 @@
-using System.Collections.Generic;
-
 namespace ZB.MOM.WW.LmxOpcUa.Host.Configuration
 {
     /// <summary>

src/ZB.MOM.WW.LmxOpcUa.Host/Configuration/MxAccessConfiguration.cs

@@ -41,7 +41,8 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.Configuration
         public int MonitorIntervalSeconds { get; set; } = 5;
 
         /// <summary>
-        /// Gets or sets a value indicating whether the bridge should automatically attempt to re-establish a dropped MXAccess session.
+        ///     Gets or sets a value indicating whether the bridge should automatically attempt to re-establish a dropped MXAccess
+        ///     session.
         /// </summary>
         public bool AutoReconnect { get; set; } = true;
 

src/ZB.MOM.WW.LmxOpcUa.Host/Configuration/OpcUaConfiguration.cs

@@ -33,7 +33,7 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.Configuration
 
         /// <summary>
         ///     Gets or sets the explicit application URI for this server instance.
-        /// When <see langword="null"/>, defaults to <c>urn:{GalaxyName}:LmxOpcUa</c>.
+        ///     When <see langword="null" />, defaults to <c>urn:{GalaxyName}:LmxOpcUa</c>.
         ///     Must be set to a unique value per instance when redundancy is enabled.
         /// </summary>
         public string? ApplicationUri { get; set; }

src/ZB.MOM.WW.LmxOpcUa.Host/Configuration/RedundancyConfiguration.cs

@@ -9,7 +9,7 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.Configuration
     public class RedundancyConfiguration
     {
         /// <summary>
-        /// Gets or sets whether redundancy is enabled. When <see langword="false"/> (default),
+        ///     Gets or sets whether redundancy is enabled. When <see langword="false" /> (default),
         ///     the server reports <c>RedundancySupport.None</c> and <c>ServiceLevel = 255</c>.
         /// </summary>
         public bool Enabled { get; set; } = false;
@@ -29,7 +29,7 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.Configuration
         ///     Gets or sets the ApplicationUri values for all servers in the redundant set.
         ///     Must include this instance's own <c>OpcUa.ApplicationUri</c>.
         /// </summary>
-        public List<string> ServerUris { get; set; } = new List<string>();
+        public List<string> ServerUris { get; set; } = new();
 
         /// <summary>
         ///     Gets or sets the base ServiceLevel when the server is fully healthy.

src/ZB.MOM.WW.LmxOpcUa.Host/Configuration/SecurityProfileConfiguration.cs

@@ -3,7 +3,8 @@ using System.Collections.Generic;
 namespace ZB.MOM.WW.LmxOpcUa.Host.Configuration
 {
     /// <summary>
-    /// Transport security settings that control which OPC UA security profiles the server exposes and how client certificates are handled.
+    ///     Transport security settings that control which OPC UA security profiles the server exposes and how client
+    ///     certificates are handled.
     /// </summary>
     public class SecurityProfileConfiguration
     {
@@ -12,11 +13,11 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.Configuration
         ///     Valid values: "None", "Basic256Sha256-Sign", "Basic256Sha256-SignAndEncrypt".
         ///     Defaults to ["None"] for backward compatibility.
         /// </summary>
-        public List<string> Profiles { get; set; } = new List<string> { "None" };
+        public List<string> Profiles { get; set; } = new() { "None" };
 
         /// <summary>
         ///     Gets or sets a value indicating whether the server automatically accepts client certificates
-        /// that are not in the trusted store. Should be <see langword="false"/> in production.
+        ///     that are not in the trusted store. Should be <see langword="false" /> in production.
         /// </summary>
         public bool AutoAcceptClientCertificates { get; set; } = true;
 
@@ -32,13 +33,13 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.Configuration
 
         /// <summary>
         ///     Gets or sets an optional override for the PKI root directory.
-        /// When <see langword="null"/>, defaults to <c>%LOCALAPPDATA%\OPC Foundation\pki</c>.
+        ///     When <see langword="null" />, defaults to <c>%LOCALAPPDATA%\OPC Foundation\pki</c>.
         /// </summary>
         public string? PkiRootPath { get; set; }
 
         /// <summary>
         ///     Gets or sets an optional override for the server certificate subject name.
-        /// When <see langword="null"/>, defaults to <c>CN={ServerName}, O=ZB MOM, DC=localhost</c>.
+        ///     When <see langword="null" />, defaults to <c>CN={ServerName}, O=ZB MOM, DC=localhost</c>.
         /// </summary>
         public string? CertificateSubject { get; set; }
     }

src/ZB.MOM.WW.LmxOpcUa.Host/Domain/ConnectionStateChangedEventArgs.cs

@@ -7,6 +7,19 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.Domain
     /// </summary>
     public class ConnectionStateChangedEventArgs : EventArgs
     {
+        /// <summary>
+        ///     Initializes a new instance of the <see cref="ConnectionStateChangedEventArgs" /> class.
+        /// </summary>
+        /// <param name="previous">The connection state being exited.</param>
+        /// <param name="current">The connection state being entered.</param>
+        /// <param name="message">Additional context about the transition, such as a connection fault or reconnect attempt.</param>
+        public ConnectionStateChangedEventArgs(ConnectionState previous, ConnectionState current, string message = "")
+        {
+            PreviousState = previous;
+            CurrentState = current;
+            Message = message ?? "";
+        }
+
         /// <summary>
         ///     Gets the previous MXAccess connection state before the transition was raised.
         /// </summary>
@@ -21,18 +34,5 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.Domain
         ///     Gets an operator-facing message that explains why the connection state changed.
         /// </summary>
         public string Message { get; }
-
-        /// <summary>
-        /// Initializes a new instance of the <see cref="ConnectionStateChangedEventArgs"/> class.
-        /// </summary>
-        /// <param name="previous">The connection state being exited.</param>
-        /// <param name="current">The connection state being entered.</param>
-        /// <param name="message">Additional context about the transition, such as a connection fault or reconnect attempt.</param>
-        public ConnectionStateChangedEventArgs(ConnectionState previous, ConnectionState current, string message = "")
-        {
-            PreviousState = previous;
-            CurrentState = current;
-            Message = message ?? "";
-        }
     }
 }

src/ZB.MOM.WW.LmxOpcUa.Host/Domain/GalaxyAttributeInfo.cs

@@ -51,7 +51,8 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.Domain
         public string PrimitiveName { get; set; } = "";
 
         /// <summary>
-        /// Gets or sets the source classification that explains whether the attribute comes from configuration, calculation, or runtime data.
+        ///     Gets or sets the source classification that explains whether the attribute comes from configuration, calculation,
+        ///     or runtime data.
         /// </summary>
         public string AttributeSource { get; set; } = "";
 
@@ -62,7 +63,8 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.Domain
         public int SecurityClassification { get; set; } = 1;
 
         /// <summary>
-        /// Gets or sets a value indicating whether the attribute has a HistoryExtension primitive and is historized by the Wonderware Historian.
+        ///     Gets or sets a value indicating whether the attribute has a HistoryExtension primitive and is historized by the
+        ///     Wonderware Historian.
         /// </summary>
         public bool IsHistorized { get; set; }
 

src/ZB.MOM.WW.LmxOpcUa.Host/Domain/IGalaxyRepository.cs

@@ -28,14 +28,14 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.Domain
         ///     Gets the last Galaxy deploy timestamp used to detect metadata changes that require an address-space rebuild.
         /// </summary>
         /// <param name="ct">A token that cancels the repository query.</param>
-        /// <returns>The latest deploy timestamp, or <see langword="null"/> when it cannot be determined.</returns>
+        /// <returns>The latest deploy timestamp, or <see langword="null" /> when it cannot be determined.</returns>
         Task<DateTime?> GetLastDeployTimeAsync(CancellationToken ct = default);
 
         /// <summary>
         ///     Verifies that the service can reach the Galaxy repository before it attempts to build the address space.
         /// </summary>
         /// <param name="ct">A token that cancels the connectivity check.</param>
-        /// <returns><see langword="true"/> when repository access succeeds; otherwise, <see langword="false"/>.</returns>
+        /// <returns><see langword="true" /> when repository access succeeds; otherwise, <see langword="false" />.</returns>
         Task<bool> TestConnectionAsync(CancellationToken ct = default);
 
         /// <summary>

src/ZB.MOM.WW.LmxOpcUa.Host/Domain/IMxAccessClient.cs

@@ -15,6 +15,16 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.Domain
         /// </summary>
         ConnectionState State { get; }
 
+        /// <summary>
+        ///     Gets the number of active runtime subscriptions currently being mirrored into OPC UA.
+        /// </summary>
+        int ActiveSubscriptionCount { get; }
+
+        /// <summary>
+        ///     Gets the number of reconnect cycles attempted since the client was created.
+        /// </summary>
+        int ReconnectCount { get; }
+
         /// <summary>
         ///     Occurs when the MXAccess session changes state so the host can update diagnostics and retry logic.
         /// </summary>
@@ -63,17 +73,7 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.Domain
         /// <param name="fullTagReference">The fully qualified MXAccess reference for the target attribute.</param>
         /// <param name="value">The value to write to the runtime.</param>
         /// <param name="ct">A token that cancels the write.</param>
-        /// <returns><see langword="true"/> when the write is accepted by the runtime; otherwise, <see langword="false"/>.</returns>
+        /// <returns><see langword="true" /> when the write is accepted by the runtime; otherwise, <see langword="false" />.</returns>
         Task<bool> WriteAsync(string fullTagReference, object value, CancellationToken ct = default);
-
-        /// <summary>
-        /// Gets the number of active runtime subscriptions currently being mirrored into OPC UA.
-        /// </summary>
-        int ActiveSubscriptionCount { get; }
-
-        /// <summary>
-        /// Gets the number of reconnect cycles attempted since the client was created.
-        /// </summary>
-        int ReconnectCount { get; }
     }
 }

src/ZB.MOM.WW.LmxOpcUa.Host/Domain/IMxProxy.cs

@@ -1,4 +1,3 @@
-using System;
 using ArchestrA.MxAccess;
 
 namespace ZB.MOM.WW.LmxOpcUa.Host.Domain
@@ -46,7 +45,7 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.Domain
         /// <summary>
         ///     Unregisters the bridge from the runtime proxy and releases the connection handle.
         /// </summary>
-        /// <param name="handle">The connection handle returned by <see cref="Register(string)"/>.</param>
+        /// <param name="handle">The connection handle returned by <see cref="Register(string)" />.</param>
         void Unregister(int handle);
 
         /// <summary>
@@ -61,7 +60,7 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.Domain
         ///     Removes a previously registered attribute from the runtime session.
         /// </summary>
         /// <param name="handle">The runtime connection handle.</param>
-        /// <param name="itemHandle">The item handle returned by <see cref="AddItem(int, string)"/>.</param>
+        /// <param name="itemHandle">The item handle returned by <see cref="AddItem(int, string)" />.</param>
         void RemoveItem(int handle, int itemHandle);
 
         /// <summary>

src/ZB.MOM.WW.LmxOpcUa.Host/Domain/IUserAuthenticationProvider.cs

@@ -3,7 +3,8 @@ using System.Collections.Generic;
 namespace ZB.MOM.WW.LmxOpcUa.Host.Domain
 {
     /// <summary>
-    /// Pluggable interface for validating user credentials. Implement for different backing stores (config file, LDAP, etc.).
+    ///     Pluggable interface for validating user credentials. Implement for different backing stores (config file, LDAP,
+    ///     etc.).
     /// </summary>
     public interface IUserAuthenticationProvider
     {

src/ZB.MOM.WW.LmxOpcUa.Host/Domain/LdapAuthenticationProvider.cs

@@ -1,7 +1,6 @@
 using System;
 using System.Collections.Generic;
 using System.DirectoryServices.Protocols;
-using System.Linq;
 using System.Net;
 using Serilog;
 using ZB.MOM.WW.LmxOpcUa.Host.Configuration;
@@ -31,30 +30,6 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.Domain
             };
         }
 
-        public bool ValidateCredentials(string username, string password)
-        {
-            try
-            {
-                var bindDn = _config.BindDnTemplate.Replace("{username}", username);
-                using (var connection = CreateConnection())
-                {
-                    connection.Bind(new NetworkCredential(bindDn, password));
-                }
-                Log.Debug("LDAP bind succeeded for {Username}", username);
-                return true;
-            }
-            catch (LdapException ex)
-            {
-                Log.Debug("LDAP bind failed for {Username}: {Error}", username, ex.Message);
-                return false;
-            }
-            catch (Exception ex)
-            {
-                Log.Warning(ex, "LDAP error during credential validation for {Username}", username);
-                return false;
-            }
-        }
-
         public IReadOnlyList<string> GetUserRoles(string username)
         {
             try
@@ -87,15 +62,12 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.Domain
                     }
 
                     var roles = new List<string>();
-                    for (int i = 0; i < memberOf.Count; i++)
+                    for (var i = 0; i < memberOf.Count; i++)
                     {
                         var dn = memberOf[i]?.ToString() ?? "";
                         // Extract the OU/CN from the memberOf DN (e.g., "ou=ReadWrite,ou=groups,dc=...")
                         var groupName = ExtractGroupName(dn);
-                        if (groupName != null && _groupToRole.TryGetValue(groupName, out var role))
+                        if (groupName != null && _groupToRole.TryGetValue(groupName, out var role)) roles.Add(role);
-                        {
-                            roles.Add(role);
-                        }
                     }
 
                     if (roles.Count == 0)
@@ -115,6 +87,31 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.Domain
             }
         }
 
+        public bool ValidateCredentials(string username, string password)
+        {
+            try
+            {
+                var bindDn = _config.BindDnTemplate.Replace("{username}", username);
+                using (var connection = CreateConnection())
+                {
+                    connection.Bind(new NetworkCredential(bindDn, password));
+                }
+
+                Log.Debug("LDAP bind succeeded for {Username}", username);
+                return true;
+            }
+            catch (LdapException ex)
+            {
+                Log.Debug("LDAP bind failed for {Username}: {Error}", username, ex.Message);
+                return false;
+            }
+            catch (Exception ex)
+            {
+                Log.Warning(ex, "LDAP error during credential validation for {Username}", username);
+                return false;
+            }
+        }
+
         private LdapConnection CreateConnection()
         {
             var identifier = new LdapDirectoryIdentifier(_config.Host, _config.Port);

src/ZB.MOM.WW.LmxOpcUa.Host/Domain/Quality.cs

@@ -10,30 +10,37 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.Domain
         ///     No valid process value is available.
         /// </summary>
         Bad = 0,
+
         /// <summary>
         ///     The value is invalid because the Galaxy attribute definition or mapping is wrong.
         /// </summary>
         BadConfigError = 4,
+
         /// <summary>
         ///     The bridge is not currently connected to the Galaxy runtime.
         /// </summary>
         BadNotConnected = 8,
+
         /// <summary>
         ///     The runtime device or adapter failed while obtaining the value.
         /// </summary>
         BadDeviceFailure = 12,
+
         /// <summary>
         ///     The underlying field source reported a bad sensor condition.
         /// </summary>
         BadSensorFailure = 16,
+
         /// <summary>
         ///     Communication with the runtime failed while retrieving the value.
         /// </summary>
         BadCommFailure = 20,
+
         /// <summary>
         ///     The attribute is intentionally unavailable for service, such as a locked or unwritable value.
         /// </summary>
         BadOutOfService = 24,
+
         /// <summary>
         ///     The bridge is still waiting for the first usable value after startup or resubscription.
         /// </summary>
@@ -44,18 +51,22 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.Domain
         ///     A value is available, but it should be treated cautiously.
         /// </summary>
         Uncertain = 64,
+
         /// <summary>
         ///     The last usable value is being repeated because a newer one is unavailable.
         /// </summary>
         UncertainLastUsable = 68,
+
         /// <summary>
         ///     The sensor or source is providing a value with reduced accuracy.
         /// </summary>
         UncertainSensorNotAccurate = 80,
+
         /// <summary>
         ///     The value exceeds its engineered limits.
         /// </summary>
         UncertainEuExceeded = 84,
+
         /// <summary>
         ///     The source is operating in a degraded or subnormal state.
         /// </summary>
@@ -66,6 +77,7 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.Domain
         ///     The value is current and suitable for normal client use.
         /// </summary>
         Good = 192,
+
         /// <summary>
         ///     The value is good but currently overridden locally rather than flowing from the live source.
         /// </summary>
@@ -81,21 +93,30 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.Domain
         ///     Determines whether the quality represents a good runtime value that can be trusted by OPC UA clients.
         /// </summary>
         /// <param name="q">The quality code to inspect.</param>
-        /// <returns><see langword="true"/> when the value is in the good quality range; otherwise, <see langword="false"/>.</returns>
+        /// <returns><see langword="true" /> when the value is in the good quality range; otherwise, <see langword="false" />.</returns>
-        public static bool IsGood(this Quality q) => (byte)q >= 192;
+        public static bool IsGood(this Quality q)
+        {
+            return (byte)q >= 192;
+        }
 
         /// <summary>
         ///     Determines whether the quality represents an uncertain runtime value that should be treated cautiously.
         /// </summary>
         /// <param name="q">The quality code to inspect.</param>
-        /// <returns><see langword="true"/> when the value is in the uncertain range; otherwise, <see langword="false"/>.</returns>
+        /// <returns><see langword="true" /> when the value is in the uncertain range; otherwise, <see langword="false" />.</returns>
-        public static bool IsUncertain(this Quality q) => (byte)q >= 64 && (byte)q < 192;
+        public static bool IsUncertain(this Quality q)
+        {
+            return (byte)q >= 64 && (byte)q < 192;
+        }
 
         /// <summary>
         ///     Determines whether the quality represents a bad runtime value that should not be used as valid process data.
         /// </summary>
         /// <param name="q">The quality code to inspect.</param>
-        /// <returns><see langword="true"/> when the value is in the bad range; otherwise, <see langword="false"/>.</returns>
+        /// <returns><see langword="true" /> when the value is in the bad range; otherwise, <see langword="false" />.</returns>
-        public static bool IsBad(this Quality q) => (byte)q < 64;
+        public static bool IsBad(this Quality q)
+        {
+            return (byte)q < 64;
+        }
     }
 }

src/ZB.MOM.WW.LmxOpcUa.Host/Domain/QualityMapper.cs

@@ -1,3 +1,5 @@
+using System;
+
 namespace ZB.MOM.WW.LmxOpcUa.Host.Domain
 {
     /// <summary>
@@ -16,7 +18,7 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.Domain
             var b = (byte)(mxQuality & 0xFF);
 
             // Try exact match first
-            if (System.Enum.IsDefined(typeof(Quality), b))
+            if (Enum.IsDefined(typeof(Quality), b))
                 return (Quality)b;
 
             // Fall back to category

src/ZB.MOM.WW.LmxOpcUa.Host/Domain/SecurityClassificationMapper.cs

@@ -10,8 +10,10 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.Domain
         ///     Determines whether an attribute with the given security classification should allow writes.
         /// </summary>
         /// <param name="securityClassification">The Galaxy security classification value.</param>
-        /// <returns><see langword="true"/> for FreeAccess (0), Operate (1), Tune (4), Configure (5);
+        /// <returns>
-        /// <see langword="false"/> for SecuredWrite (2), VerifiedWrite (3), ViewOnly (6).</returns>
+        ///     <see langword="true" /> for FreeAccess (0), Operate (1), Tune (4), Configure (5);
+        ///     <see langword="false" /> for SecuredWrite (2), VerifiedWrite (3), ViewOnly (6).
+        /// </returns>
         public static bool IsWritable(int securityClassification)
         {
             switch (securityClassification)

src/ZB.MOM.WW.LmxOpcUa.Host/Domain/Vtq.cs

@@ -23,7 +23,7 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.Domain
         public Quality Quality { get; }
 
         /// <summary>
-        /// Initializes a new instance of the <see cref="Vtq"/> struct for a Galaxy attribute value.
+        ///     Initializes a new instance of the <see cref="Vtq" /> struct for a Galaxy attribute value.
         /// </summary>
         /// <param name="value">The runtime value returned by MXAccess.</param>
         /// <param name="timestamp">The timestamp assigned to the runtime value.</param>
@@ -40,37 +40,57 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.Domain
         /// </summary>
         /// <param name="value">The runtime value to wrap.</param>
         /// <returns>A VTQ carrying the provided value with the current UTC timestamp and good quality.</returns>
-        public static Vtq Good(object? value) => new Vtq(value, DateTime.UtcNow, Quality.Good);
+        public static Vtq Good(object? value)
+        {
+            return new Vtq(value, DateTime.UtcNow, Quality.Good);
+        }
 
         /// <summary>
         ///     Creates a bad-quality VTQ snapshot when no usable runtime value is available.
         /// </summary>
         /// <param name="quality">The specific bad quality reason to expose to clients.</param>
         /// <returns>A VTQ with no value, the current UTC timestamp, and the requested bad quality.</returns>
-        public static Vtq Bad(Quality quality = Quality.Bad) => new Vtq(null, DateTime.UtcNow, quality);
+        public static Vtq Bad(Quality quality = Quality.Bad)
+        {
+            return new Vtq(null, DateTime.UtcNow, quality);
+        }
 
         /// <summary>
         ///     Creates an uncertain VTQ snapshot when the runtime value exists but should be treated cautiously.
         /// </summary>
         /// <param name="value">The runtime value to wrap.</param>
         /// <returns>A VTQ carrying the provided value with the current UTC timestamp and uncertain quality.</returns>
-        public static Vtq Uncertain(object? value) => new Vtq(value, DateTime.UtcNow, Quality.Uncertain);
+        public static Vtq Uncertain(object? value)
+        {
+            return new Vtq(value, DateTime.UtcNow, Quality.Uncertain);
+        }
 
         /// <summary>
         ///     Compares two VTQ snapshots for exact value, timestamp, and quality equality.
         /// </summary>
         /// <param name="other">The other VTQ snapshot to compare.</param>
-        /// <returns><see langword="true"/> when all fields match; otherwise, <see langword="false"/>.</returns>
+        /// <returns><see langword="true" /> when all fields match; otherwise, <see langword="false" />.</returns>
-        public bool Equals(Vtq other) =>
+        public bool Equals(Vtq other)
-            Equals(Value, other.Value) && Timestamp == other.Timestamp && Quality == other.Quality;
+        {
+            return Equals(Value, other.Value) && Timestamp == other.Timestamp && Quality == other.Quality;
+        }
 
         /// <inheritdoc />
-        public override bool Equals(object? obj) => obj is Vtq other && Equals(other);
+        public override bool Equals(object? obj)
+        {
+            return obj is Vtq other && Equals(other);
+        }
 
         /// <inheritdoc />
-        public override int GetHashCode() => HashCode.Combine(Value, Timestamp, Quality);
+        public override int GetHashCode()
+        {
+            return HashCode.Combine(Value, Timestamp, Quality);
+        }
 
         /// <inheritdoc />
-        public override string ToString() => $"Vtq({Value}, {Timestamp:O}, {Quality})";
+        public override string ToString()
+        {
+            return $"Vtq({Value}, {Timestamp:O}, {Quality})";
+        }
     }
 }

src/ZB.MOM.WW.LmxOpcUa.Host/GalaxyRepository/ChangeDetectionService.cs

@@ -2,7 +2,6 @@ using System;
 using System.Threading;
 using System.Threading.Tasks;
 using Serilog;
-using ZB.MOM.WW.LmxOpcUa.Host.Configuration;
 using ZB.MOM.WW.LmxOpcUa.Host.Domain;
 
 namespace ZB.MOM.WW.LmxOpcUa.Host.GalaxyRepository
@@ -13,21 +12,10 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.GalaxyRepository
     public class ChangeDetectionService : IDisposable
     {
         private static readonly ILogger Log = Serilog.Log.ForContext<ChangeDetectionService>();
+        private readonly int _intervalSeconds;
 
         private readonly IGalaxyRepository _repository;
-        private readonly int _intervalSeconds;
         private CancellationTokenSource? _cts;
-        private DateTime? _lastKnownDeployTime;
-
-        /// <summary>
-        /// Occurs when a new Galaxy deploy timestamp indicates the OPC UA address space should be rebuilt.
-        /// </summary>
-        public event Action? OnGalaxyChanged;
-
-        /// <summary>
-        /// Gets the last deploy timestamp observed by the polling loop.
-        /// </summary>
-        public DateTime? LastKnownDeployTime => _lastKnownDeployTime;
 
         /// <summary>
         ///     Initializes a new change detector for Galaxy deploy timestamps.
@@ -35,13 +23,33 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.GalaxyRepository
         /// <param name="repository">The repository used to query the latest deploy timestamp.</param>
         /// <param name="intervalSeconds">The polling interval, in seconds, between deploy checks.</param>
         /// <param name="initialDeployTime">An optional deploy timestamp already known at service startup.</param>
-        public ChangeDetectionService(IGalaxyRepository repository, int intervalSeconds, DateTime? initialDeployTime = null)
+        public ChangeDetectionService(IGalaxyRepository repository, int intervalSeconds,
+            DateTime? initialDeployTime = null)
         {
             _repository = repository;
             _intervalSeconds = intervalSeconds;
-            _lastKnownDeployTime = initialDeployTime;
+            LastKnownDeployTime = initialDeployTime;
         }
 
+        /// <summary>
+        ///     Gets the last deploy timestamp observed by the polling loop.
+        /// </summary>
+        public DateTime? LastKnownDeployTime { get; private set; }
+
+        /// <summary>
+        ///     Stops the polling loop and disposes the underlying cancellation resources.
+        /// </summary>
+        public void Dispose()
+        {
+            Stop();
+            _cts?.Dispose();
+        }
+
+        /// <summary>
+        ///     Occurs when a new Galaxy deploy timestamp indicates the OPC UA address space should be rebuilt.
+        /// </summary>
+        public event Action? OnGalaxyChanged;
+
         /// <summary>
         ///     Starts the background polling loop that watches for Galaxy deploy changes.
         /// </summary>
@@ -64,7 +72,7 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.GalaxyRepository
         private async Task PollLoopAsync(CancellationToken ct)
         {
             // If no initial deploy time was provided, first poll triggers unconditionally
-            bool firstPoll = _lastKnownDeployTime == null;
+            var firstPoll = LastKnownDeployTime == null;
 
             while (!ct.IsCancellationRequested)
             {
@@ -75,15 +83,15 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.GalaxyRepository
                     if (firstPoll)
                     {
                         firstPoll = false;
-                        _lastKnownDeployTime = deployTime;
+                        LastKnownDeployTime = deployTime;
                         Log.Information("Initial deploy time: {DeployTime}", deployTime);
                         OnGalaxyChanged?.Invoke();
                     }
-                    else if (deployTime != _lastKnownDeployTime)
+                    else if (deployTime != LastKnownDeployTime)
                     {
                         Log.Information("Galaxy deployment change detected: {Previous} → {Current}",
-                            _lastKnownDeployTime, deployTime);
+                            LastKnownDeployTime, deployTime);
-                        _lastKnownDeployTime = deployTime;
+                        LastKnownDeployTime = deployTime;
                         OnGalaxyChanged?.Invoke();
                     }
                 }
@@ -106,14 +114,5 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.GalaxyRepository
                 }
             }
         }
-
-        /// <summary>
-        /// Stops the polling loop and disposes the underlying cancellation resources.
-        /// </summary>
-        public void Dispose()
-        {
-            Stop();
-            _cts?.Dispose();
-        }
     }
 }

src/ZB.MOM.WW.LmxOpcUa.Host/GalaxyRepository/GalaxyRepositoryService.cs

@@ -18,11 +18,179 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.GalaxyRepository
 
         private readonly GalaxyRepositoryConfiguration _config;
 
+        /// <summary>
+        ///     Initializes a new repository service that reads Galaxy metadata from the configured SQL database.
+        /// </summary>
+        /// <param name="config">The repository connection, timeout, and attribute-selection settings.</param>
+        public GalaxyRepositoryService(GalaxyRepositoryConfiguration config)
+        {
+            _config = config;
+        }
+
         /// <summary>
         ///     Occurs when the repository detects a Galaxy deploy change that should trigger an address-space rebuild.
         /// </summary>
         public event Action? OnGalaxyChanged;
 
+        /// <summary>
+        ///     Queries the Galaxy repository for the deployed object hierarchy that becomes the OPC UA browse tree.
+        /// </summary>
+        /// <param name="ct">A token that cancels the database query.</param>
+        /// <returns>The deployed Galaxy objects that should appear in the namespace.</returns>
+        public async Task<List<GalaxyObjectInfo>> GetHierarchyAsync(CancellationToken ct = default)
+        {
+            var results = new List<GalaxyObjectInfo>();
+
+            using var conn = new SqlConnection(_config.ConnectionString);
+            await conn.OpenAsync(ct);
+
+            using var cmd = new SqlCommand(HierarchySql, conn) { CommandTimeout = _config.CommandTimeoutSeconds };
+            using var reader = await cmd.ExecuteReaderAsync(ct);
+
+            while (await reader.ReadAsync(ct))
+                results.Add(new GalaxyObjectInfo
+                {
+                    GobjectId = Convert.ToInt32(reader.GetValue(0)),
+                    TagName = reader.GetString(1),
+                    ContainedName = reader.IsDBNull(2) ? "" : reader.GetString(2),
+                    BrowseName = reader.GetString(3),
+                    ParentGobjectId = Convert.ToInt32(reader.GetValue(4)),
+                    IsArea = Convert.ToInt32(reader.GetValue(5)) == 1
+                });
+
+            if (results.Count == 0)
+                Log.Warning("GetHierarchyAsync returned zero rows");
+            else
+                Log.Information("GetHierarchyAsync returned {Count} objects", results.Count);
+
+            return results;
+        }
+
+        /// <summary>
+        ///     Queries the Galaxy repository for attribute metadata that becomes OPC UA variable nodes.
+        /// </summary>
+        /// <param name="ct">A token that cancels the database query.</param>
+        /// <returns>The attribute rows required to build runtime tag mappings and variable metadata.</returns>
+        public async Task<List<GalaxyAttributeInfo>> GetAttributesAsync(CancellationToken ct = default)
+        {
+            var results = new List<GalaxyAttributeInfo>();
+            var extended = _config.ExtendedAttributes;
+            var sql = extended ? ExtendedAttributesSql : AttributesSql;
+
+            using var conn = new SqlConnection(_config.ConnectionString);
+            await conn.OpenAsync(ct);
+
+            using var cmd = new SqlCommand(sql, conn) { CommandTimeout = _config.CommandTimeoutSeconds };
+            using var reader = await cmd.ExecuteReaderAsync(ct);
+
+            while (await reader.ReadAsync(ct))
+                results.Add(extended ? ReadExtendedAttribute(reader) : ReadStandardAttribute(reader));
+
+            Log.Information("GetAttributesAsync returned {Count} attributes (extended={Extended})", results.Count,
+                extended);
+            return results;
+        }
+
+        /// <summary>
+        ///     Reads the latest Galaxy deploy timestamp so change detection can decide whether the address space is stale.
+        /// </summary>
+        /// <param name="ct">A token that cancels the database query.</param>
+        /// <returns>The most recent deploy timestamp, or <see langword="null" /> when none is available.</returns>
+        public async Task<DateTime?> GetLastDeployTimeAsync(CancellationToken ct = default)
+        {
+            using var conn = new SqlConnection(_config.ConnectionString);
+            await conn.OpenAsync(ct);
+
+            using var cmd = new SqlCommand(ChangeDetectionSql, conn) { CommandTimeout = _config.CommandTimeoutSeconds };
+            var result = await cmd.ExecuteScalarAsync(ct);
+
+            return result is DateTime dt ? dt : null;
+        }
+
+        /// <summary>
+        ///     Executes a lightweight query to confirm that the repository database is reachable.
+        /// </summary>
+        /// <param name="ct">A token that cancels the connectivity check.</param>
+        /// <returns><see langword="true" /> when the query succeeds; otherwise, <see langword="false" />.</returns>
+        public async Task<bool> TestConnectionAsync(CancellationToken ct = default)
+        {
+            try
+            {
+                using var conn = new SqlConnection(_config.ConnectionString);
+                await conn.OpenAsync(ct);
+
+                using var cmd = new SqlCommand(TestConnectionSql, conn)
+                    { CommandTimeout = _config.CommandTimeoutSeconds };
+                await cmd.ExecuteScalarAsync(ct);
+
+                Log.Information("Galaxy repository database connection successful");
+                return true;
+            }
+            catch (Exception ex)
+            {
+                Log.Warning(ex, "Galaxy repository database connection failed");
+                return false;
+            }
+        }
+
+        /// <summary>
+        ///     Reads a row from the standard attributes query (12 columns).
+        ///     Columns: gobject_id, tag_name, attribute_name, full_tag_reference, mx_data_type,
+        ///     data_type_name, is_array, array_dimension, mx_attribute_category,
+        ///     security_classification, is_historized, is_alarm
+        /// </summary>
+        private static GalaxyAttributeInfo ReadStandardAttribute(SqlDataReader reader)
+        {
+            return new GalaxyAttributeInfo
+            {
+                GobjectId = Convert.ToInt32(reader.GetValue(0)),
+                TagName = reader.GetString(1),
+                AttributeName = reader.GetString(2),
+                FullTagReference = reader.GetString(3),
+                MxDataType = Convert.ToInt32(reader.GetValue(4)),
+                DataTypeName = reader.IsDBNull(5) ? "" : reader.GetString(5),
+                IsArray = Convert.ToBoolean(reader.GetValue(6)),
+                ArrayDimension = reader.IsDBNull(7) ? null : Convert.ToInt32(reader.GetValue(7)),
+                SecurityClassification = Convert.ToInt32(reader.GetValue(9)),
+                IsHistorized = Convert.ToInt32(reader.GetValue(10)) == 1,
+                IsAlarm = Convert.ToInt32(reader.GetValue(11)) == 1
+            };
+        }
+
+        /// <summary>
+        ///     Reads a row from the extended attributes query (14 columns).
+        ///     Columns: gobject_id, tag_name, primitive_name, attribute_name, full_tag_reference,
+        ///     mx_data_type, data_type_name, is_array, array_dimension,
+        ///     mx_attribute_category, security_classification, is_historized, is_alarm, attribute_source
+        /// </summary>
+        private static GalaxyAttributeInfo ReadExtendedAttribute(SqlDataReader reader)
+        {
+            return new GalaxyAttributeInfo
+            {
+                GobjectId = Convert.ToInt32(reader.GetValue(0)),
+                TagName = reader.GetString(1),
+                PrimitiveName = reader.IsDBNull(2) ? "" : reader.GetString(2),
+                AttributeName = reader.GetString(3),
+                FullTagReference = reader.GetString(4),
+                MxDataType = Convert.ToInt32(reader.GetValue(5)),
+                DataTypeName = reader.IsDBNull(6) ? "" : reader.GetString(6),
+                IsArray = Convert.ToBoolean(reader.GetValue(7)),
+                ArrayDimension = reader.IsDBNull(8) ? null : Convert.ToInt32(reader.GetValue(8)),
+                SecurityClassification = Convert.ToInt32(reader.GetValue(10)),
+                IsHistorized = Convert.ToInt32(reader.GetValue(11)) == 1,
+                IsAlarm = Convert.ToInt32(reader.GetValue(12)) == 1,
+                AttributeSource = reader.IsDBNull(13) ? "" : reader.GetString(13)
+            };
+        }
+
+        /// <summary>
+        ///     Raises the change event used by tests and monitoring components to simulate or announce a Galaxy deploy.
+        /// </summary>
+        public void RaiseGalaxyChanged()
+        {
+            OnGalaxyChanged?.Invoke();
+        }
+
         #region SQL Queries (GR-006: const string, no dynamic SQL)
 
         private const string HierarchySql = @"
@@ -263,172 +431,5 @@ ORDER BY tag_name, primitive_name, attribute_name";
         private const string TestConnectionSql = "SELECT 1";
 
         #endregion
-
-        /// <summary>
-        /// Initializes a new repository service that reads Galaxy metadata from the configured SQL database.
-        /// </summary>
-        /// <param name="config">The repository connection, timeout, and attribute-selection settings.</param>
-        public GalaxyRepositoryService(GalaxyRepositoryConfiguration config)
-        {
-            _config = config;
-        }
-
-        /// <summary>
-        /// Queries the Galaxy repository for the deployed object hierarchy that becomes the OPC UA browse tree.
-        /// </summary>
-        /// <param name="ct">A token that cancels the database query.</param>
-        /// <returns>The deployed Galaxy objects that should appear in the namespace.</returns>
-        public async Task<List<GalaxyObjectInfo>> GetHierarchyAsync(CancellationToken ct = default)
-        {
-            var results = new List<GalaxyObjectInfo>();
-
-            using var conn = new SqlConnection(_config.ConnectionString);
-            await conn.OpenAsync(ct);
-
-            using var cmd = new SqlCommand(HierarchySql, conn) { CommandTimeout = _config.CommandTimeoutSeconds };
-            using var reader = await cmd.ExecuteReaderAsync(ct);
-
-            while (await reader.ReadAsync(ct))
-            {
-                results.Add(new GalaxyObjectInfo
-                {
-                    GobjectId = Convert.ToInt32(reader.GetValue(0)),
-                    TagName = reader.GetString(1),
-                    ContainedName = reader.IsDBNull(2) ? "" : reader.GetString(2),
-                    BrowseName = reader.GetString(3),
-                    ParentGobjectId = Convert.ToInt32(reader.GetValue(4)),
-                    IsArea = Convert.ToInt32(reader.GetValue(5)) == 1
-                });
-            }
-
-            if (results.Count == 0)
-                Log.Warning("GetHierarchyAsync returned zero rows");
-            else
-                Log.Information("GetHierarchyAsync returned {Count} objects", results.Count);
-
-            return results;
-        }
-
-        /// <summary>
-        /// Queries the Galaxy repository for attribute metadata that becomes OPC UA variable nodes.
-        /// </summary>
-        /// <param name="ct">A token that cancels the database query.</param>
-        /// <returns>The attribute rows required to build runtime tag mappings and variable metadata.</returns>
-        public async Task<List<GalaxyAttributeInfo>> GetAttributesAsync(CancellationToken ct = default)
-        {
-            var results = new List<GalaxyAttributeInfo>();
-            var extended = _config.ExtendedAttributes;
-            var sql = extended ? ExtendedAttributesSql : AttributesSql;
-
-            using var conn = new SqlConnection(_config.ConnectionString);
-            await conn.OpenAsync(ct);
-
-            using var cmd = new SqlCommand(sql, conn) { CommandTimeout = _config.CommandTimeoutSeconds };
-            using var reader = await cmd.ExecuteReaderAsync(ct);
-
-            while (await reader.ReadAsync(ct))
-            {
-                results.Add(extended ? ReadExtendedAttribute(reader) : ReadStandardAttribute(reader));
-            }
-
-            Log.Information("GetAttributesAsync returned {Count} attributes (extended={Extended})", results.Count, extended);
-            return results;
-        }
-
-        /// <summary>
-        /// Reads a row from the standard attributes query (12 columns).
-        /// Columns: gobject_id, tag_name, attribute_name, full_tag_reference, mx_data_type,
-        ///          data_type_name, is_array, array_dimension, mx_attribute_category,
-        ///          security_classification, is_historized, is_alarm
-        /// </summary>
-        private static GalaxyAttributeInfo ReadStandardAttribute(SqlDataReader reader)
-        {
-            return new GalaxyAttributeInfo
-            {
-                GobjectId = Convert.ToInt32(reader.GetValue(0)),
-                TagName = reader.GetString(1),
-                AttributeName = reader.GetString(2),
-                FullTagReference = reader.GetString(3),
-                MxDataType = Convert.ToInt32(reader.GetValue(4)),
-                DataTypeName = reader.IsDBNull(5) ? "" : reader.GetString(5),
-                IsArray = Convert.ToBoolean(reader.GetValue(6)),
-                ArrayDimension = reader.IsDBNull(7) ? null : (int?)Convert.ToInt32(reader.GetValue(7)),
-                SecurityClassification = Convert.ToInt32(reader.GetValue(9)),
-                IsHistorized = Convert.ToInt32(reader.GetValue(10)) == 1,
-                IsAlarm = Convert.ToInt32(reader.GetValue(11)) == 1
-            };
-        }
-
-        /// <summary>
-        /// Reads a row from the extended attributes query (14 columns).
-        /// Columns: gobject_id, tag_name, primitive_name, attribute_name, full_tag_reference,
-        ///          mx_data_type, data_type_name, is_array, array_dimension,
-        ///          mx_attribute_category, security_classification, is_historized, is_alarm, attribute_source
-        /// </summary>
-        private static GalaxyAttributeInfo ReadExtendedAttribute(SqlDataReader reader)
-        {
-            return new GalaxyAttributeInfo
-            {
-                GobjectId = Convert.ToInt32(reader.GetValue(0)),
-                TagName = reader.GetString(1),
-                PrimitiveName = reader.IsDBNull(2) ? "" : reader.GetString(2),
-                AttributeName = reader.GetString(3),
-                FullTagReference = reader.GetString(4),
-                MxDataType = Convert.ToInt32(reader.GetValue(5)),
-                DataTypeName = reader.IsDBNull(6) ? "" : reader.GetString(6),
-                IsArray = Convert.ToBoolean(reader.GetValue(7)),
-                ArrayDimension = reader.IsDBNull(8) ? null : (int?)Convert.ToInt32(reader.GetValue(8)),
-                SecurityClassification = Convert.ToInt32(reader.GetValue(10)),
-                IsHistorized = Convert.ToInt32(reader.GetValue(11)) == 1,
-                IsAlarm = Convert.ToInt32(reader.GetValue(12)) == 1,
-                AttributeSource = reader.IsDBNull(13) ? "" : reader.GetString(13)
-            };
-        }
-
-        /// <summary>
-        /// Reads the latest Galaxy deploy timestamp so change detection can decide whether the address space is stale.
-        /// </summary>
-        /// <param name="ct">A token that cancels the database query.</param>
-        /// <returns>The most recent deploy timestamp, or <see langword="null"/> when none is available.</returns>
-        public async Task<DateTime?> GetLastDeployTimeAsync(CancellationToken ct = default)
-        {
-            using var conn = new SqlConnection(_config.ConnectionString);
-            await conn.OpenAsync(ct);
-
-            using var cmd = new SqlCommand(ChangeDetectionSql, conn) { CommandTimeout = _config.CommandTimeoutSeconds };
-            var result = await cmd.ExecuteScalarAsync(ct);
-
-            return result is DateTime dt ? dt : null;
-        }
-
-        /// <summary>
-        /// Executes a lightweight query to confirm that the repository database is reachable.
-        /// </summary>
-        /// <param name="ct">A token that cancels the connectivity check.</param>
-        /// <returns><see langword="true"/> when the query succeeds; otherwise, <see langword="false"/>.</returns>
-        public async Task<bool> TestConnectionAsync(CancellationToken ct = default)
-        {
-            try
-            {
-                using var conn = new SqlConnection(_config.ConnectionString);
-                await conn.OpenAsync(ct);
-
-                using var cmd = new SqlCommand(TestConnectionSql, conn) { CommandTimeout = _config.CommandTimeoutSeconds };
-                await cmd.ExecuteScalarAsync(ct);
-
-                Log.Information("Galaxy repository database connection successful");
-                return true;
-            }
-            catch (Exception ex)
-            {
-                Log.Warning(ex, "Galaxy repository database connection failed");
-                return false;
-            }
-        }
-
-        /// <summary>
-        /// Raises the change event used by tests and monitoring components to simulate or announce a Galaxy deploy.
-        /// </summary>
-        public void RaiseGalaxyChanged() => OnGalaxyChanged?.Invoke();
     }
 }

src/ZB.MOM.WW.LmxOpcUa.Host/Metrics/PerformanceMetrics.cs

@@ -9,7 +9,7 @@ using Serilog;
 namespace ZB.MOM.WW.LmxOpcUa.Host.Metrics
 {
     /// <summary>
-    /// Disposable scope returned by <see cref="PerformanceMetrics.BeginOperation"/>. (MXA-008)
+    ///     Disposable scope returned by <see cref="PerformanceMetrics.BeginOperation" />. (MXA-008)
     /// </summary>
     public interface ITimingScope : IDisposable
     {
@@ -66,13 +66,13 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.Metrics
     /// </summary>
     public class OperationMetrics
     {
-        private readonly List<double> _durations = new List<double>();
+        private readonly List<double> _durations = new();
-        private readonly object _lock = new object();
+        private readonly object _lock = new();
-        private long _totalCount;
-        private long _successCount;
-        private double _totalMilliseconds;
-        private double _minMilliseconds = double.MaxValue;
         private double _maxMilliseconds;
+        private double _minMilliseconds = double.MaxValue;
+        private long _successCount;
+        private long _totalCount;
+        private double _totalMilliseconds;
 
         /// <summary>
         ///     Records the outcome and duration of a single bridge operation invocation.
@@ -132,8 +132,8 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.Metrics
     {
         private static readonly ILogger Logger = Log.ForContext<PerformanceMetrics>();
 
-        private readonly ConcurrentDictionary<string, OperationMetrics> _metrics
+        private readonly ConcurrentDictionary<string, OperationMetrics>
-            = new ConcurrentDictionary<string, OperationMetrics>(StringComparer.OrdinalIgnoreCase);
+            _metrics = new(StringComparer.OrdinalIgnoreCase);
 
         private readonly Timer _reportingTimer;
         private bool _disposed;
@@ -147,6 +147,17 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.Metrics
                 TimeSpan.FromSeconds(60), TimeSpan.FromSeconds(60));
         }
 
+        /// <summary>
+        ///     Stops periodic reporting and emits a final metrics snapshot.
+        /// </summary>
+        public void Dispose()
+        {
+            if (_disposed) return;
+            _disposed = true;
+            _reportingTimer.Dispose();
+            ReportMetrics(null);
+        }
+
         /// <summary>
         ///     Records a completed bridge operation under the specified metrics bucket.
         /// </summary>
@@ -173,7 +184,7 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.Metrics
         ///     Retrieves the raw metrics bucket for a named operation.
         /// </summary>
         /// <param name="operationName">The logical operation name to look up.</param>
-        /// <returns>The metrics bucket when present; otherwise, <see langword="null"/>.</returns>
+        /// <returns>The metrics bucket when present; otherwise, <see langword="null" />.</returns>
         public OperationMetrics? GetMetrics(string operationName)
         {
             return _metrics.TryGetValue(operationName, out var metrics) ? metrics : null;
@@ -207,17 +218,6 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.Metrics
             }
         }
 
-        /// <summary>
-        /// Stops periodic reporting and emits a final metrics snapshot.
-        /// </summary>
-        public void Dispose()
-        {
-            if (_disposed) return;
-            _disposed = true;
-            _reportingTimer.Dispose();
-            ReportMetrics(null);
-        }
-
         /// <summary>
         ///     Timing scope that records one operation result into the owning metrics collector.
         /// </summary>
@@ -226,8 +226,8 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.Metrics
             private readonly PerformanceMetrics _metrics;
             private readonly string _operationName;
             private readonly Stopwatch _stopwatch;
-            private bool _success = true;
             private bool _disposed;
+            private bool _success = true;
 
             /// <summary>
             ///     Initializes a timing scope for a named bridge operation.
@@ -245,7 +245,10 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.Metrics
             ///     Marks whether the timed operation should be recorded as successful.
             /// </summary>
             /// <param name="success">A value indicating whether the operation succeeded.</param>
-            public void SetSuccess(bool success) => _success = success;
+            public void SetSuccess(bool success)
+            {
+                _success = success;
+            }
 
             /// <summary>
             ///     Stops timing and records the operation result once.

src/ZB.MOM.WW.LmxOpcUa.Host/MxAccess/MxAccessClient.Connection.cs

@@ -1,8 +1,6 @@
 using System;
-using System.Runtime.InteropServices;
 using System.Threading;
 using System.Threading.Tasks;
-using Serilog;
 using ZB.MOM.WW.LmxOpcUa.Host.Domain;
 
 namespace ZB.MOM.WW.LmxOpcUa.Host.MxAccess
@@ -72,7 +70,6 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.MxAccess
                 {
                     // UnAdvise + RemoveItem for all active subscriptions
                     foreach (var kvp in _addressToHandle)
-                    {
                         try
                         {
                             _proxy.UnAdviseSupervisory(_connectionHandle, kvp.Value);
@@ -82,14 +79,19 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.MxAccess
                         {
                             Log.Warning(ex, "Error cleaning up subscription for {Address}", kvp.Key);
                         }
-                    }
 
                     // Unwire events before unregister
                     DetachProxyEvents();
 
                     // Unregister
-                    try { _proxy.Unregister(_connectionHandle); }
+                    try
-                    catch (Exception ex) { Log.Warning(ex, "Error during Unregister"); }
+                    {
+                        _proxy.Unregister(_connectionHandle);
+                    }
+                    catch (Exception ex)
+                    {
+                        Log.Warning(ex, "Error during Unregister");
+                    }
                 });
 
                 _handleToAddress.Clear();

src/ZB.MOM.WW.LmxOpcUa.Host/MxAccess/MxAccessClient.EventHandlers.cs

@@ -1,6 +1,5 @@
 using System;
 using ArchestrA.MxAccess;
-using Serilog;
 using ZB.MOM.WW.LmxOpcUa.Host.Domain;
 
 namespace ZB.MOM.WW.LmxOpcUa.Host.MxAccess
@@ -31,30 +30,21 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.MxAccess
 
                 // Check MXSTATUS_PROXY — if success is false, use more specific quality
                 if (ItemStatus != null && ItemStatus.Length > 0 && ItemStatus[0].success == 0)
-                {
                     quality = MxErrorCodes.MapToQuality(ItemStatus[0].detail);
-                }
 
                 var timestamp = ConvertTimestamp(pftItemTimeStamp);
                 var vtq = new Vtq(pvItemValue, timestamp, quality);
 
                 // Update probe timestamp
                 if (string.Equals(address, _probeTag, StringComparison.OrdinalIgnoreCase))
-                {
                     _lastProbeValueTime = DateTime.UtcNow;
-                }
 
                 // Invoke stored subscription callback
-                if (_storedSubscriptions.TryGetValue(address, out var callback))
+                if (_storedSubscriptions.TryGetValue(address, out var callback)) callback(address, vtq);
-                {
-                    callback(address, vtq);
-                }
 
                 if (_pendingReadsByAddress.TryGetValue(address, out var pendingReads))
-                {
                     foreach (var pendingRead in pendingReads.Values)
                         pendingRead.TrySetResult(vtq);
-                }
 
                 // Global handler
                 OnTagValueChanged?.Invoke(address, vtq);
@@ -77,7 +67,7 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.MxAccess
             {
                 if (_pendingWrites.TryRemove(phItemHandle, out var tcs))
                 {
-                    bool success = ItemStatus == null || ItemStatus.Length == 0 || ItemStatus[0].success != 0;
+                    var success = ItemStatus == null || ItemStatus.Length == 0 || ItemStatus[0].success != 0;
                     if (success)
                     {
                         tcs.TrySetResult(true);

src/ZB.MOM.WW.LmxOpcUa.Host/MxAccess/MxAccessClient.Monitor.cs

@@ -1,7 +1,6 @@
 using System;
 using System.Threading;
 using System.Threading.Tasks;
-using Serilog;
 using ZB.MOM.WW.LmxOpcUa.Host.Domain;
 
 namespace ZB.MOM.WW.LmxOpcUa.Host.MxAccess
@@ -41,7 +40,8 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.MxAccess
 
                 try
                 {
-                    if ((_state == ConnectionState.Disconnected || _state == ConnectionState.Error) && _config.AutoReconnect)
+                    if ((_state == ConnectionState.Disconnected || _state == ConnectionState.Error) &&
+                        _config.AutoReconnect)
                     {
                         Log.Information("Monitor: connection lost (state={State}), attempting reconnect", _state);
                         await ReconnectAsync();

src/ZB.MOM.WW.LmxOpcUa.Host/MxAccess/MxAccessClient.ReadWrite.cs

@@ -1,7 +1,7 @@
 using System;
+using System.Collections.Concurrent;
 using System.Threading;
 using System.Threading.Tasks;
-using Serilog;
 using ZB.MOM.WW.LmxOpcUa.Host.Domain;
 
 namespace ZB.MOM.WW.LmxOpcUa.Host.MxAccess
@@ -33,7 +33,7 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.MxAccess
                 });
 
                 var pendingReads = _pendingReadsByAddress.GetOrAdd(fullTagReference,
-                    _ => new System.Collections.Concurrent.ConcurrentDictionary<int, TaskCompletionSource<Vtq>>());
+                    _ => new ConcurrentDictionary<int, TaskCompletionSource<Vtq>>());
                 pendingReads[itemHandle] = tcs;
                 _handleToAddress[itemHandle] = fullTagReference;
 
@@ -91,7 +91,7 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.MxAccess
         /// <param name="fullTagReference">The fully qualified Galaxy tag reference to write.</param>
         /// <param name="value">The value to send to the runtime.</param>
         /// <param name="ct">A token that cancels the write.</param>
-        /// <returns><see langword="true"/> when the runtime acknowledges success; otherwise, <see langword="false"/>.</returns>
+        /// <returns><see langword="true" /> when the runtime acknowledges success; otherwise, <see langword="false" />.</returns>
         public async Task<bool> WriteAsync(string fullTagReference, object value, CancellationToken ct = default)
         {
             if (_state != ConnectionState.Connected) return false;
@@ -121,7 +121,8 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.MxAccess
                     cts.CancelAfter(TimeSpan.FromSeconds(_config.WriteTimeoutSeconds));
                     cts.Token.Register(() =>
                     {
-                        Log.Warning("Write timed out for {Address} after {Timeout}s", fullTagReference, _config.WriteTimeoutSeconds);
+                        Log.Warning("Write timed out for {Address} after {Timeout}s", fullTagReference,
+                            _config.WriteTimeoutSeconds);
                         tcs.TrySetResult(false);
                     });
 

src/ZB.MOM.WW.LmxOpcUa.Host/MxAccess/MxAccessClient.Subscription.cs

@@ -1,6 +1,5 @@
 using System;
 using System.Threading.Tasks;
-using Serilog;
 using ZB.MOM.WW.LmxOpcUa.Host.Domain;
 
 namespace ZB.MOM.WW.LmxOpcUa.Host.MxAccess
@@ -38,7 +37,6 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.MxAccess
                 _handleToAddress.TryRemove(itemHandle, out _);
 
                 if (_state == ConnectionState.Connected)
-                {
                     await _staThread.RunAsync(() =>
                     {
                         try
@@ -53,7 +51,6 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.MxAccess
                     });
             }
         }
-        }
 
         private async Task SubscribeInternalAsync(string address)
         {
@@ -95,7 +92,6 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.MxAccess
         private async Task ReplayStoredSubscriptionsAsync()
         {
             foreach (var kvp in _storedSubscriptions)
-            {
                 try
                 {
                     await SubscribeInternalAsync(kvp.Key);
@@ -104,7 +100,6 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.MxAccess
                 {
                     Log.Warning(ex, "Failed to replay subscription for {Address}", kvp.Key);
                 }
-            }
 
             Log.Information("Replayed {Count} stored subscriptions", _storedSubscriptions.Count);
         }

src/ZB.MOM.WW.LmxOpcUa.Host/MxAccess/MxAccessClient.cs

@@ -1,6 +1,5 @@
 using System;
 using System.Collections.Concurrent;
-using System.Collections.Generic;
 using System.Threading;
 using System.Threading.Tasks;
 using Serilog;
@@ -18,36 +17,55 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.MxAccess
     public sealed partial class MxAccessClient : IMxAccessClient
     {
         private static readonly ILogger Log = Serilog.Log.ForContext<MxAccessClient>();
-
+        private readonly ConcurrentDictionary<string, int> _addressToHandle = new(StringComparer.OrdinalIgnoreCase);
-        private readonly StaComThread _staThread;
-        private readonly IMxProxy _proxy;
         private readonly MxAccessConfiguration _config;
+
+        // Handle mappings
+        private readonly ConcurrentDictionary<int, string> _handleToAddress = new();
         private readonly PerformanceMetrics _metrics;
         private readonly SemaphoreSlim _operationSemaphore;
 
-        private int _connectionHandle;
+        private readonly ConcurrentDictionary<string, ConcurrentDictionary<int, TaskCompletionSource<Vtq>>>
-        private volatile ConnectionState _state = ConnectionState.Disconnected;
+            _pendingReadsByAddress
-        private bool _proxyEventsAttached;
+                = new(StringComparer.OrdinalIgnoreCase);
-        private CancellationTokenSource? _monitorCts;
 
-        // Handle mappings
+        // Pending writes
-        private readonly ConcurrentDictionary<int, string> _handleToAddress = new ConcurrentDictionary<int, string>();
+        private readonly ConcurrentDictionary<int, TaskCompletionSource<bool>> _pendingWrites = new();
-        private readonly ConcurrentDictionary<string, int> _addressToHandle = new ConcurrentDictionary<string, int>(StringComparer.OrdinalIgnoreCase);
+
+        private readonly IMxProxy _proxy;
+
+        private readonly StaComThread _staThread;
 
         // Subscription storage
         private readonly ConcurrentDictionary<string, Action<string, Vtq>> _storedSubscriptions
-            = new ConcurrentDictionary<string, Action<string, Vtq>>(StringComparer.OrdinalIgnoreCase);
+            = new(StringComparer.OrdinalIgnoreCase);
 
-        // Pending writes
+        private int _connectionHandle;
-        private readonly ConcurrentDictionary<int, TaskCompletionSource<bool>> _pendingWrites
+        private DateTime _lastProbeValueTime = DateTime.UtcNow;
-            = new ConcurrentDictionary<int, TaskCompletionSource<bool>>();
+        private CancellationTokenSource? _monitorCts;
-        private readonly ConcurrentDictionary<string, ConcurrentDictionary<int, TaskCompletionSource<Vtq>>> _pendingReadsByAddress
-            = new ConcurrentDictionary<string, ConcurrentDictionary<int, TaskCompletionSource<Vtq>>>(StringComparer.OrdinalIgnoreCase);
 
         // Probe
         private string? _probeTag;
-        private DateTime _lastProbeValueTime = DateTime.UtcNow;
+        private bool _proxyEventsAttached;
         private int _reconnectCount;
+        private volatile ConnectionState _state = ConnectionState.Disconnected;
+
+        /// <summary>
+        ///     Initializes a new MXAccess client around the STA thread, COM proxy abstraction, and runtime throttling settings.
+        /// </summary>
+        /// <param name="staThread">The STA thread used to marshal COM interactions.</param>
+        /// <param name="proxy">The COM proxy abstraction used to talk to the runtime.</param>
+        /// <param name="config">The runtime timeout, throttling, and reconnect settings.</param>
+        /// <param name="metrics">The metrics collector used to time MXAccess operations.</param>
+        public MxAccessClient(StaComThread staThread, IMxProxy proxy, MxAccessConfiguration config,
+            PerformanceMetrics metrics)
+        {
+            _staThread = staThread;
+            _proxy = proxy;
+            _config = config;
+            _metrics = metrics;
+            _operationSemaphore = new SemaphoreSlim(config.MaxConcurrentOperations, config.MaxConcurrentOperations);
+        }
 
         /// <summary>
         ///     Gets the current runtime connection state for the MXAccess client.
@@ -74,31 +92,6 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.MxAccess
         /// </summary>
         public event Action<string, Vtq>? OnTagValueChanged;
 
-        /// <summary>
-        /// Initializes a new MXAccess client around the STA thread, COM proxy abstraction, and runtime throttling settings.
-        /// </summary>
-        /// <param name="staThread">The STA thread used to marshal COM interactions.</param>
-        /// <param name="proxy">The COM proxy abstraction used to talk to the runtime.</param>
-        /// <param name="config">The runtime timeout, throttling, and reconnect settings.</param>
-        /// <param name="metrics">The metrics collector used to time MXAccess operations.</param>
-        public MxAccessClient(StaComThread staThread, IMxProxy proxy, MxAccessConfiguration config, PerformanceMetrics metrics)
-        {
-            _staThread = staThread;
-            _proxy = proxy;
-            _config = config;
-            _metrics = metrics;
-            _operationSemaphore = new SemaphoreSlim(config.MaxConcurrentOperations, config.MaxConcurrentOperations);
-        }
-
-        private void SetState(ConnectionState newState, string message = "")
-        {
-            var previous = _state;
-            if (previous == newState) return;
-            _state = newState;
-            Log.Information("MxAccess state: {Previous} → {Current} {Message}", previous, newState, message);
-            ConnectionStateChanged?.Invoke(this, new ConnectionStateChangedEventArgs(previous, newState, message));
-        }
-
         /// <summary>
         ///     Cancels monitoring and disconnects the runtime session before releasing local resources.
         /// </summary>
@@ -119,5 +112,14 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.MxAccess
                 _monitorCts?.Dispose();
             }
         }
+
+        private void SetState(ConnectionState newState, string message = "")
+        {
+            var previous = _state;
+            if (previous == newState) return;
+            _state = newState;
+            Log.Information("MxAccess state: {Previous} → {Current} {Message}", previous, newState, message);
+            ConnectionStateChanged?.Invoke(this, new ConnectionStateChangedEventArgs(previous, newState, message));
+        }
     }
 }

src/ZB.MOM.WW.LmxOpcUa.Host/MxAccess/MxProxyAdapter.cs

@@ -45,11 +45,10 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.MxAccess
         /// <summary>
         ///     Unregisters the COM proxy session and releases the underlying COM object.
         /// </summary>
-        /// <param name="handle">The runtime connection handle returned by <see cref="Register(string)"/>.</param>
+        /// <param name="handle">The runtime connection handle returned by <see cref="Register(string)" />.</param>
         public void Unregister(int handle)
         {
             if (_lmxProxy != null)
-            {
                 try
                 {
                     _lmxProxy.OnDataChange -= ProxyOnDataChange;
@@ -62,7 +61,6 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.MxAccess
                     _lmxProxy = null;
                 }
         }
-        }
 
         /// <summary>
         ///     Resolves a Galaxy attribute reference into a runtime item handle through the COM proxy.
@@ -70,28 +68,40 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.MxAccess
         /// <param name="handle">The runtime connection handle.</param>
         /// <param name="address">The fully qualified Galaxy attribute reference.</param>
         /// <returns>The item handle assigned by the COM proxy.</returns>
-        public int AddItem(int handle, string address) => _lmxProxy!.AddItem(handle, address);
+        public int AddItem(int handle, string address)
+        {
+            return _lmxProxy!.AddItem(handle, address);
+        }
 
         /// <summary>
         ///     Removes an item handle from the active COM proxy session.
         /// </summary>
         /// <param name="handle">The runtime connection handle.</param>
         /// <param name="itemHandle">The item handle to remove.</param>
-        public void RemoveItem(int handle, int itemHandle) => _lmxProxy!.RemoveItem(handle, itemHandle);
+        public void RemoveItem(int handle, int itemHandle)
+        {
+            _lmxProxy!.RemoveItem(handle, itemHandle);
+        }
 
         /// <summary>
         ///     Enables supervisory callbacks for the specified runtime item.
         /// </summary>
         /// <param name="handle">The runtime connection handle.</param>
         /// <param name="itemHandle">The item handle to monitor.</param>
-        public void AdviseSupervisory(int handle, int itemHandle) => _lmxProxy!.AdviseSupervisory(handle, itemHandle);
+        public void AdviseSupervisory(int handle, int itemHandle)
+        {
+            _lmxProxy!.AdviseSupervisory(handle, itemHandle);
+        }
 
         /// <summary>
         ///     Disables supervisory callbacks for the specified runtime item.
         /// </summary>
         /// <param name="handle">The runtime connection handle.</param>
         /// <param name="itemHandle">The item handle to stop monitoring.</param>
-        public void UnAdviseSupervisory(int handle, int itemHandle) => _lmxProxy!.UnAdvise(handle, itemHandle);
+        public void UnAdviseSupervisory(int handle, int itemHandle)
+        {
+            _lmxProxy!.UnAdvise(handle, itemHandle);
+        }
 
         /// <summary>
         ///     Writes a value to the specified runtime item through the COM proxy.
@@ -101,12 +111,15 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.MxAccess
         /// <param name="value">The value to send to the runtime.</param>
         /// <param name="securityClassification">The Wonderware security classification applied to the write.</param>
         public void Write(int handle, int itemHandle, object value, int securityClassification)
-            => _lmxProxy!.Write(handle, itemHandle, value, securityClassification);
+        {
+            _lmxProxy!.Write(handle, itemHandle, value, securityClassification);
+        }
 
         private void ProxyOnDataChange(int hLMXServerHandle, int phItemHandle, object pvItemValue,
             int pwItemQuality, object pftItemTimeStamp, ref MXSTATUS_PROXY[] ItemStatus)
         {
-            OnDataChange?.Invoke(hLMXServerHandle, phItemHandle, pvItemValue, pwItemQuality, pftItemTimeStamp, ref ItemStatus);
+            OnDataChange?.Invoke(hLMXServerHandle, phItemHandle, pvItemValue, pwItemQuality, pftItemTimeStamp,
+                ref ItemStatus);
         }
 
         private void ProxyOnWriteComplete(int hLMXServerHandle, int phItemHandle, ref MXSTATUS_PROXY[] ItemStatus)

src/ZB.MOM.WW.LmxOpcUa.Host/MxAccess/StaComThread.cs

@@ -18,18 +18,18 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.MxAccess
 
         private static readonly ILogger Log = Serilog.Log.ForContext<StaComThread>();
         private static readonly TimeSpan PumpLogInterval = TimeSpan.FromMinutes(5);
+        private readonly TaskCompletionSource<bool> _ready = new();
 
         private readonly Thread _thread;
-        private readonly TaskCompletionSource<bool> _ready = new TaskCompletionSource<bool>();
+        private readonly ConcurrentQueue<Action> _workItems = new();
-        private readonly ConcurrentQueue<Action> _workItems = new ConcurrentQueue<Action>();
-        private volatile uint _nativeThreadId;
-        private bool _disposed;
-
-        private long _totalMessages;
         private long _appMessages;
         private long _dispatchedMessages;
-        private long _workItemsExecuted;
+        private bool _disposed;
         private DateTime _lastLogTime;
+        private volatile uint _nativeThreadId;
+
+        private long _totalMessages;
+        private long _workItemsExecuted;
 
         /// <summary>
         ///     Initializes a dedicated STA thread wrapper for Wonderware COM interop.
@@ -49,6 +49,28 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.MxAccess
         /// </summary>
         public bool IsRunning => _nativeThreadId != 0 && !_disposed;
 
+        /// <summary>
+        ///     Stops the STA thread and releases the message-pump resources used for COM interop.
+        /// </summary>
+        public void Dispose()
+        {
+            if (_disposed) return;
+            _disposed = true;
+
+            try
+            {
+                if (_nativeThreadId != 0)
+                    PostThreadMessage(_nativeThreadId, WM_APP + 1, IntPtr.Zero, IntPtr.Zero);
+                _thread.Join(TimeSpan.FromSeconds(5));
+            }
+            catch (Exception ex)
+            {
+                Log.Warning(ex, "Error shutting down STA COM thread");
+            }
+
+            Log.Information("STA COM thread stopped");
+        }
+
         /// <summary>
         ///     Starts the STA thread and waits until its message pump is ready for COM work.
         /// </summary>
@@ -111,28 +133,6 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.MxAccess
             return tcs.Task;
         }
 
-        /// <summary>
-        /// Stops the STA thread and releases the message-pump resources used for COM interop.
-        /// </summary>
-        public void Dispose()
-        {
-            if (_disposed) return;
-            _disposed = true;
-
-            try
-            {
-                if (_nativeThreadId != 0)
-                    PostThreadMessage(_nativeThreadId, WM_APP + 1, IntPtr.Zero, IntPtr.Zero);
-                _thread.Join(TimeSpan.FromSeconds(5));
-            }
-            catch (Exception ex)
-            {
-                Log.Warning(ex, "Error shutting down STA COM thread");
-            }
-
-            Log.Information("STA COM thread stopped");
-        }
-
         private void ThreadEntry()
         {
             try
@@ -171,7 +171,8 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.MxAccess
                     LogPumpStatsIfDue();
                 }
 
-                Log.Information("STA message pump exited (Total={Total}, App={App}, Dispatched={Dispatched}, WorkItems={WorkItems})",
+                Log.Information(
+                    "STA message pump exited (Total={Total}, App={App}, Dispatched={Dispatched}, WorkItems={WorkItems})",
                     _totalMessages, _appMessages, _dispatchedMessages, _workItemsExecuted);
             }
             catch (Exception ex)
@@ -186,8 +187,14 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.MxAccess
             while (_workItems.TryDequeue(out var workItem))
             {
                 _workItemsExecuted++;
-                try { workItem(); }
+                try
-                catch (Exception ex) { Log.Error(ex, "Unhandled exception in STA work item"); }
+                {
+                    workItem();
+                }
+                catch (Exception ex)
+                {
+                    Log.Error(ex, "Unhandled exception in STA work item");
+                }
             }
         }
 
@@ -195,7 +202,8 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.MxAccess
         {
             var now = DateTime.UtcNow;
             if (now - _lastLogTime < PumpLogInterval) return;
-            Log.Debug("STA pump alive: Total={Total}, App={App}, Dispatched={Dispatched}, WorkItems={WorkItems}, Pending={Pending}",
+            Log.Debug(
+                "STA pump alive: Total={Total}, App={App}, Dispatched={Dispatched}, WorkItems={WorkItems}, Pending={Pending}",
                 _totalMessages, _appMessages, _dispatchedMessages, _workItemsExecuted, _workItems.Count);
             _lastLogTime = now;
         }
@@ -239,7 +247,8 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.MxAccess
 
         [DllImport("user32.dll")]
         [return: MarshalAs(UnmanagedType.Bool)]
-        private static extern bool PeekMessage(out MSG lpMsg, IntPtr hWnd, uint wMsgFilterMin, uint wMsgFilterMax, uint wRemoveMsg);
+        private static extern bool PeekMessage(out MSG lpMsg, IntPtr hWnd, uint wMsgFilterMin, uint wMsgFilterMax,
+            uint wRemoveMsg);
 
         [DllImport("kernel32.dll")]
         private static extern uint GetCurrentThreadId();

src/ZB.MOM.WW.LmxOpcUa.Host/OpcUa/AddressSpaceBuilder.cs

@@ -14,6 +14,93 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
     {
         private static readonly ILogger Log = Serilog.Log.ForContext<AddressSpaceBuilder>();
 
+        /// <summary>
+        ///     Builds an in-memory model of the Galaxy hierarchy and attribute mappings before the OPC UA server materializes
+        ///     nodes.
+        /// </summary>
+        /// <param name="hierarchy">The Galaxy object hierarchy returned by the repository.</param>
+        /// <param name="attributes">The Galaxy attribute rows associated with the hierarchy.</param>
+        /// <returns>An address-space model containing roots, variables, and tag-reference mappings.</returns>
+        public static AddressSpaceModel Build(List<GalaxyObjectInfo> hierarchy, List<GalaxyAttributeInfo> attributes)
+        {
+            var model = new AddressSpaceModel();
+            var objectMap = hierarchy.ToDictionary(h => h.GobjectId);
+
+            var attrsByObject = attributes
+                .GroupBy(a => a.GobjectId)
+                .ToDictionary(g => g.Key, g => g.ToList());
+
+            // Build parent→children map
+            var childrenByParent = hierarchy.GroupBy(h => h.ParentGobjectId)
+                .ToDictionary(g => g.Key, g => g.ToList());
+
+            // Find root objects (parent not in hierarchy)
+            var knownIds = new HashSet<int>(hierarchy.Select(h => h.GobjectId));
+
+            foreach (var obj in hierarchy)
+            {
+                var nodeInfo = BuildNodeInfo(obj, attrsByObject, childrenByParent, model);
+
+                if (!knownIds.Contains(obj.ParentGobjectId))
+                    model.RootNodes.Add(nodeInfo);
+            }
+
+            Log.Information("Address space model: {Objects} objects, {Variables} variables, {Mappings} tag refs",
+                model.ObjectCount, model.VariableCount, model.NodeIdToTagReference.Count);
+
+            return model;
+        }
+
+        private static NodeInfo BuildNodeInfo(GalaxyObjectInfo obj,
+            Dictionary<int, List<GalaxyAttributeInfo>> attrsByObject,
+            Dictionary<int, List<GalaxyObjectInfo>> childrenByParent,
+            AddressSpaceModel model)
+        {
+            var node = new NodeInfo
+            {
+                GobjectId = obj.GobjectId,
+                TagName = obj.TagName,
+                BrowseName = obj.BrowseName,
+                ParentGobjectId = obj.ParentGobjectId,
+                IsArea = obj.IsArea
+            };
+
+            if (!obj.IsArea)
+                model.ObjectCount++;
+
+            if (attrsByObject.TryGetValue(obj.GobjectId, out var attrs))
+                foreach (var attr in attrs)
+                {
+                    node.Attributes.Add(new AttributeNodeInfo
+                    {
+                        AttributeName = attr.AttributeName,
+                        FullTagReference = attr.FullTagReference,
+                        MxDataType = attr.MxDataType,
+                        IsArray = attr.IsArray,
+                        ArrayDimension = attr.ArrayDimension,
+                        PrimitiveName = attr.PrimitiveName ?? "",
+                        SecurityClassification = attr.SecurityClassification,
+                        IsHistorized = attr.IsHistorized,
+                        IsAlarm = attr.IsAlarm
+                    });
+
+                    model.NodeIdToTagReference[GetNodeIdentifier(attr)] = attr.FullTagReference;
+                    model.VariableCount++;
+                }
+
+            return node;
+        }
+
+        private static string GetNodeIdentifier(GalaxyAttributeInfo attr)
+        {
+            if (!attr.IsArray)
+                return attr.FullTagReference;
+
+            return attr.FullTagReference.EndsWith("[]", StringComparison.Ordinal)
+                ? attr.FullTagReference.Substring(0, attr.FullTagReference.Length - 2)
+                : attr.FullTagReference;
+        }
+
         /// <summary>
         ///     Node info for the address space tree.
         /// </summary>
@@ -120,7 +207,8 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
             /// <summary>
             ///     Gets or sets the mapping from OPC UA node identifiers to runtime tag references.
             /// </summary>
-            public Dictionary<string, string> NodeIdToTagReference { get; set; } = new(StringComparer.OrdinalIgnoreCase);
+            public Dictionary<string, string> NodeIdToTagReference { get; set; } =
+                new(StringComparer.OrdinalIgnoreCase);
 
             /// <summary>
             ///     Gets or sets the number of non-area Galaxy objects included in the model.
@@ -132,93 +220,5 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
             /// </summary>
             public int VariableCount { get; set; }
         }
-
-        /// <summary>
-        /// Builds an in-memory model of the Galaxy hierarchy and attribute mappings before the OPC UA server materializes nodes.
-        /// </summary>
-        /// <param name="hierarchy">The Galaxy object hierarchy returned by the repository.</param>
-        /// <param name="attributes">The Galaxy attribute rows associated with the hierarchy.</param>
-        /// <returns>An address-space model containing roots, variables, and tag-reference mappings.</returns>
-        public static AddressSpaceModel Build(List<GalaxyObjectInfo> hierarchy, List<GalaxyAttributeInfo> attributes)
-        {
-            var model = new AddressSpaceModel();
-            var objectMap = hierarchy.ToDictionary(h => h.GobjectId);
-
-            var attrsByObject = attributes
-                .GroupBy(a => a.GobjectId)
-                .ToDictionary(g => g.Key, g => g.ToList());
-
-            // Build parent→children map
-            var childrenByParent = hierarchy.GroupBy(h => h.ParentGobjectId)
-                .ToDictionary(g => g.Key, g => g.ToList());
-
-            // Find root objects (parent not in hierarchy)
-            var knownIds = new HashSet<int>(hierarchy.Select(h => h.GobjectId));
-
-            foreach (var obj in hierarchy)
-            {
-                var nodeInfo = BuildNodeInfo(obj, attrsByObject, childrenByParent, model);
-
-                if (!knownIds.Contains(obj.ParentGobjectId))
-                    model.RootNodes.Add(nodeInfo);
-            }
-
-            Log.Information("Address space model: {Objects} objects, {Variables} variables, {Mappings} tag refs",
-                model.ObjectCount, model.VariableCount, model.NodeIdToTagReference.Count);
-
-            return model;
-        }
-
-        private static NodeInfo BuildNodeInfo(GalaxyObjectInfo obj,
-            Dictionary<int, List<GalaxyAttributeInfo>> attrsByObject,
-            Dictionary<int, List<GalaxyObjectInfo>> childrenByParent,
-            AddressSpaceModel model)
-        {
-            var node = new NodeInfo
-            {
-                GobjectId = obj.GobjectId,
-                TagName = obj.TagName,
-                BrowseName = obj.BrowseName,
-                ParentGobjectId = obj.ParentGobjectId,
-                IsArea = obj.IsArea
-            };
-
-            if (!obj.IsArea)
-                model.ObjectCount++;
-
-            if (attrsByObject.TryGetValue(obj.GobjectId, out var attrs))
-            {
-                foreach (var attr in attrs)
-                {
-                    node.Attributes.Add(new AttributeNodeInfo
-                    {
-                        AttributeName = attr.AttributeName,
-                        FullTagReference = attr.FullTagReference,
-                        MxDataType = attr.MxDataType,
-                        IsArray = attr.IsArray,
-                        ArrayDimension = attr.ArrayDimension,
-                        PrimitiveName = attr.PrimitiveName ?? "",
-                        SecurityClassification = attr.SecurityClassification,
-                        IsHistorized = attr.IsHistorized,
-                        IsAlarm = attr.IsAlarm
-                    });
-
-                    model.NodeIdToTagReference[GetNodeIdentifier(attr)] = attr.FullTagReference;
-                    model.VariableCount++;
-                }
-            }
-
-            return node;
-        }
-
-        private static string GetNodeIdentifier(GalaxyAttributeInfo attr)
-        {
-            if (!attr.IsArray)
-                return attr.FullTagReference;
-
-            return attr.FullTagReference.EndsWith("[]", StringComparison.Ordinal)
-                ? attr.FullTagReference.Substring(0, attr.FullTagReference.Length - 2)
-                : attr.FullTagReference;
-        }
     }
 }

src/ZB.MOM.WW.LmxOpcUa.Host/OpcUa/AddressSpaceDiff.cs

@@ -27,24 +27,18 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
 
             // Added objects
             foreach (var id in newObjects.Keys)
-            {
                 if (!oldObjects.ContainsKey(id))
                     changed.Add(id);
-            }
 
             // Removed objects
             foreach (var id in oldObjects.Keys)
-            {
                 if (!newObjects.ContainsKey(id))
                     changed.Add(id);
-            }
 
             // Modified objects
             foreach (var kvp in newObjects)
-            {
                 if (oldObjects.TryGetValue(kvp.Key, out var oldObj) && !ObjectsEqual(oldObj, kvp.Value))
                     changed.Add(kvp.Key);
-            }
 
             // Attribute changes — group by gobject_id and compare
             var oldAttrsByObj = oldAttributes.GroupBy(a => a.GobjectId)
@@ -88,14 +82,10 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
             {
                 var id = queue.Dequeue();
                 if (childrenByParent.TryGetValue(id, out var children))
-                {
                     foreach (var childId in children)
-                    {
                         if (expanded.Add(childId))
                             queue.Enqueue(childId);
             }
-                }
-            }
 
             return expanded;
         }
@@ -119,11 +109,9 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
             var sortedA = a.OrderBy(x => x.FullTagReference).ThenBy(x => x.PrimitiveName).ToList();
             var sortedB = b.OrderBy(x => x.FullTagReference).ThenBy(x => x.PrimitiveName).ToList();
 
-            for (int i = 0; i < sortedA.Count; i++)
+            for (var i = 0; i < sortedA.Count; i++)
-            {
                 if (!AttributesEqual(sortedA[i], sortedB[i]))
                     return false;
-            }
 
             return true;
         }

src/ZB.MOM.WW.LmxOpcUa.Host/OpcUa/DataValueConverter.cs

@@ -22,7 +22,9 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
             {
                 Value = ConvertToOpcUaValue(vtq.Value),
                 StatusCode = statusCode,
-                SourceTimestamp = vtq.Timestamp.Kind == DateTimeKind.Utc ? vtq.Timestamp : vtq.Timestamp.ToUniversalTime(),
+                SourceTimestamp = vtq.Timestamp.Kind == DateTimeKind.Utc
+                    ? vtq.Timestamp
+                    : vtq.Timestamp.ToUniversalTime(),
                 ServerTimestamp = DateTime.UtcNow
             };
 

src/ZB.MOM.WW.LmxOpcUa.Host/OpcUa/LmxNodeManager.cs

@@ -19,170 +19,54 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
     public class LmxNodeManager : CustomNodeManager2
     {
         private static readonly ILogger Log = Serilog.Log.ForContext<LmxNodeManager>();
+        private readonly Dictionary<string, AlarmInfo> _alarmAckedTags = new(StringComparer.OrdinalIgnoreCase);
+        private readonly NodeId? _alarmAckRoleId;
 
-        private readonly IMxAccessClient _mxAccessClient;
+        // Alarm tracking: maps InAlarm tag reference → alarm source info
-        private readonly PerformanceMetrics _metrics;
+        private readonly Dictionary<string, AlarmInfo> _alarmInAlarmTags = new(StringComparer.OrdinalIgnoreCase);
-        private readonly HistorianDataSource? _historianDataSource;
         private readonly bool _alarmTrackingEnabled;
         private readonly bool _anonymousCanWrite;
-        private readonly NodeId? _writeOperateRoleId;
+        private readonly AutoResetEvent _dataChangeSignal = new(false);
-        private readonly NodeId? _writeTuneRoleId;
+        private readonly Dictionary<int, List<string>> _gobjectToTagRefs = new();
-        private readonly NodeId? _writeConfigureRoleId;
+        private readonly HistorianDataSource? _historianDataSource;
-        private readonly NodeId? _alarmAckRoleId;
+        private readonly PerformanceMetrics _metrics;
+
+        private readonly IMxAccessClient _mxAccessClient;
         private readonly string _namespaceUri;
 
         // NodeId → full_tag_reference for read/write resolution
-        private readonly Dictionary<string, string> _nodeIdToTagReference = new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase);
+        private readonly Dictionary<string, string> _nodeIdToTagReference = new(StringComparer.OrdinalIgnoreCase);
 
-        // Ref-counted MXAccess subscriptions
+        // Incremental sync: persistent node map and reverse lookup
-        private readonly Dictionary<string, int> _subscriptionRefCounts = new Dictionary<string, int>(StringComparer.OrdinalIgnoreCase);
+        private readonly Dictionary<int, NodeState> _nodeMap = new();
-        private readonly Dictionary<string, BaseDataVariableState> _tagToVariableNode = new Dictionary<string, BaseDataVariableState>(StringComparer.OrdinalIgnoreCase);
-        private readonly Dictionary<string, TagMetadata> _tagMetadata = new Dictionary<string, TagMetadata>(StringComparer.OrdinalIgnoreCase);
-
-        private IDictionary<NodeId, IList<IReference>>? _externalReferences;
 
         // Data change dispatch queue: decouples MXAccess STA callbacks from OPC UA framework Lock
-        private readonly ConcurrentDictionary<string, Vtq> _pendingDataChanges = new ConcurrentDictionary<string, Vtq>(StringComparer.OrdinalIgnoreCase);
+        private readonly ConcurrentDictionary<string, Vtq> _pendingDataChanges = new(StringComparer.OrdinalIgnoreCase);
-        private readonly AutoResetEvent _dataChangeSignal = new AutoResetEvent(false);
+
-        private Thread? _dispatchThread;
+        // Ref-counted MXAccess subscriptions
-        private volatile bool _dispatchRunning;
+        private readonly Dictionary<string, int> _subscriptionRefCounts = new(StringComparer.OrdinalIgnoreCase);
+        private readonly Dictionary<string, TagMetadata> _tagMetadata = new(StringComparer.OrdinalIgnoreCase);
+
+        private readonly Dictionary<string, BaseDataVariableState> _tagToVariableNode =
+            new(StringComparer.OrdinalIgnoreCase);
+
+        private readonly NodeId? _writeConfigureRoleId;
+        private readonly NodeId? _writeOperateRoleId;
+        private readonly NodeId? _writeTuneRoleId;
+        private long _dispatchCycleCount;
         private volatile bool _dispatchDisposed;
+        private volatile bool _dispatchRunning;
+        private Thread? _dispatchThread;
+
+        private IDictionary<NodeId, IList<IReference>>? _externalReferences;
+        private List<GalaxyAttributeInfo>? _lastAttributes;
+        private List<GalaxyObjectInfo>? _lastHierarchy;
+        private DateTime _lastMetricsReportTime = DateTime.UtcNow;
+        private long _lastReportedMxChangeEvents;
+        private long _totalDispatchBatchSize;
 
         // Dispatch queue metrics
         private long _totalMxChangeEvents;
-        private long _lastReportedMxChangeEvents;
-        private long _totalDispatchBatchSize;
-        private long _dispatchCycleCount;
-        private DateTime _lastMetricsReportTime = DateTime.UtcNow;
-        private double _lastEventsPerSecond;
-        private double _lastAvgBatchSize;
-
-        private sealed class TagMetadata
-        {
-            /// <summary>
-            /// Gets or sets the MXAccess data type code used to map Galaxy values into OPC UA variants.
-            /// </summary>
-            public int MxDataType { get; set; }
-
-            /// <summary>
-            /// Gets or sets a value indicating whether the source Galaxy attribute should be exposed as an array node.
-            /// </summary>
-            public bool IsArray { get; set; }
-
-            /// <summary>
-            /// Gets or sets the declared array length from Galaxy metadata when the attribute is modeled as an array.
-            /// </summary>
-            public int? ArrayDimension { get; set; }
-
-            /// <summary>
-            /// Gets or sets the Galaxy security classification (0=FreeAccess, 1=Operate, 4=Tune, 5=Configure, etc.).
-            /// Used at write time to determine which write role is required.
-            /// </summary>
-            public int SecurityClassification { get; set; }
-        }
-
-        // Alarm tracking: maps InAlarm tag reference → alarm source info
-        private readonly Dictionary<string, AlarmInfo> _alarmInAlarmTags = new Dictionary<string, AlarmInfo>(StringComparer.OrdinalIgnoreCase);
-        private readonly Dictionary<string, AlarmInfo> _alarmAckedTags = new Dictionary<string, AlarmInfo>(StringComparer.OrdinalIgnoreCase);
-
-        // Incremental sync: persistent node map and reverse lookup
-        private readonly Dictionary<int, NodeState> _nodeMap = new Dictionary<int, NodeState>();
-        private readonly Dictionary<int, List<string>> _gobjectToTagRefs = new Dictionary<int, List<string>>();
-        private List<GalaxyObjectInfo>? _lastHierarchy;
-        private List<GalaxyAttributeInfo>? _lastAttributes;
-
-        private sealed class AlarmInfo
-        {
-            /// <summary>
-            /// Gets or sets the full tag reference for the process value whose alarm state is tracked.
-            /// </summary>
-            public string SourceTagReference { get; set; } = "";
-
-            /// <summary>
-            /// Gets or sets the OPC UA node identifier for the source variable that owns the alarm condition.
-            /// </summary>
-            public NodeId SourceNodeId { get; set; } = NodeId.Null;
-
-            /// <summary>
-            /// Gets or sets the operator-facing source name used in generated alarm events.
-            /// </summary>
-            public string SourceName { get; set; } = "";
-
-            /// <summary>
-            /// Gets or sets the most recent in-alarm state so duplicate transitions are not reissued.
-            /// </summary>
-            public bool LastInAlarm { get; set; }
-
-            /// <summary>
-            /// Gets or sets the retained OPC UA condition node associated with the source alarm.
-            /// </summary>
-            public AlarmConditionState? ConditionNode { get; set; }
-
-            /// <summary>
-            /// Gets or sets the Galaxy tag reference that supplies runtime alarm priority updates.
-            /// </summary>
-            public string PriorityTagReference { get; set; } = "";
-
-            /// <summary>
-            /// Gets or sets the Galaxy tag reference or attribute binding used to resolve the alarm message text.
-            /// </summary>
-            public string DescAttrNameTagReference { get; set; } = "";
-
-            /// <summary>
-            /// Gets or sets the cached OPC UA severity derived from the latest alarm priority value.
-            /// </summary>
-            public ushort CachedSeverity { get; set; }
-
-            /// <summary>
-            /// Gets or sets the cached alarm message used when emitting active and cleared events.
-            /// </summary>
-            public string CachedMessage { get; set; } = "";
-
-            /// <summary>
-            /// Gets or sets the Galaxy tag reference for the alarm acknowledged state.
-            /// </summary>
-            public string AckedTagReference { get; set; } = "";
-
-            /// <summary>
-            /// Gets or sets the Galaxy tag reference for the acknowledge message that triggers acknowledgment.
-            /// </summary>
-            public string AckMsgTagReference { get; set; } = "";
-        }
-
-        /// <summary>
-        /// Gets the mapping from OPC UA node identifiers to the Galaxy tag references used for runtime I/O.
-        /// </summary>
-        public IReadOnlyDictionary<string, string> NodeIdToTagReference => _nodeIdToTagReference;
-
-        /// <summary>
-        /// Gets the number of variable nodes currently published from Galaxy attributes.
-        /// </summary>
-        public int VariableNodeCount { get; private set; }
-
-        /// <summary>
-        /// Gets the number of non-area object nodes currently published from the Galaxy hierarchy.
-        /// </summary>
-        public int ObjectNodeCount { get; private set; }
-
-        /// <summary>
-        /// Gets the total number of MXAccess data change events received since startup.
-        /// </summary>
-        public long TotalMxChangeEvents => Interlocked.Read(ref _totalMxChangeEvents);
-
-        /// <summary>
-        /// Gets the number of items currently waiting in the dispatch queue.
-        /// </summary>
-        public int PendingDataChangeCount => _pendingDataChanges.Count;
-
-        /// <summary>
-        /// Gets the most recently computed MXAccess data change events per second.
-        /// </summary>
-        public double MxChangeEventsPerSecond => _lastEventsPerSecond;
-
-        /// <summary>
-        /// Gets the most recently computed average dispatch batch size (proxy for queue depth under load).
-        /// </summary>
-        public double AverageDispatchBatchSize => _lastAvgBatchSize;
 
         /// <summary>
         ///     Initializes a new node manager for the Galaxy-backed OPC UA namespace.
@@ -227,6 +111,41 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
             StartDispatchThread();
         }
 
+        /// <summary>
+        ///     Gets the mapping from OPC UA node identifiers to the Galaxy tag references used for runtime I/O.
+        /// </summary>
+        public IReadOnlyDictionary<string, string> NodeIdToTagReference => _nodeIdToTagReference;
+
+        /// <summary>
+        ///     Gets the number of variable nodes currently published from Galaxy attributes.
+        /// </summary>
+        public int VariableNodeCount { get; private set; }
+
+        /// <summary>
+        ///     Gets the number of non-area object nodes currently published from the Galaxy hierarchy.
+        /// </summary>
+        public int ObjectNodeCount { get; private set; }
+
+        /// <summary>
+        ///     Gets the total number of MXAccess data change events received since startup.
+        /// </summary>
+        public long TotalMxChangeEvents => Interlocked.Read(ref _totalMxChangeEvents);
+
+        /// <summary>
+        ///     Gets the number of items currently waiting in the dispatch queue.
+        /// </summary>
+        public int PendingDataChangeCount => _pendingDataChanges.Count;
+
+        /// <summary>
+        ///     Gets the most recently computed MXAccess data change events per second.
+        /// </summary>
+        public double MxChangeEventsPerSecond { get; private set; }
+
+        /// <summary>
+        ///     Gets the most recently computed average dispatch batch size (proxy for queue depth under load).
+        /// </summary>
+        public double AverageDispatchBatchSize { get; private set; }
+
         /// <inheritdoc />
         public override void CreateAddressSpace(IDictionary<NodeId, IList<IReference>> externalReferences)
         {
@@ -324,21 +243,18 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
                             StringComparer.OrdinalIgnoreCase);
 
                         // Track variable nodes created for direct attributes that also have primitive children
-                        var variableNodes = new Dictionary<string, BaseDataVariableState>(StringComparer.OrdinalIgnoreCase);
+                        var variableNodes =
+                            new Dictionary<string, BaseDataVariableState>(StringComparer.OrdinalIgnoreCase);
 
                         // First pass: create direct (root-level) attribute variables
                         var directGroup = byPrimitive.FirstOrDefault(g => string.IsNullOrEmpty(g.Key));
                         if (directGroup != null)
-                        {
                             foreach (var attr in directGroup)
                             {
                                 var variable = CreateAttributeVariable(node, attr);
                                 if (primitiveGroupNames.Contains(attr.AttributeName))
-                                {
                                     variableNodes[attr.AttributeName] = variable;
                             }
-                            }
-                        }
 
                         // Second pass: add primitive child attributes under the matching variable node
                         foreach (var group in byPrimitive)
@@ -361,22 +277,21 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
                                 parentForAttrs = primNode;
                             }
 
-                            foreach (var attr in group)
+                            foreach (var attr in group) CreateAttributeVariable(parentForAttrs, attr);
-                            {
-                                CreateAttributeVariable(parentForAttrs, attr);
-                            }
                         }
                     }
                 }
 
                 // Build alarm tracking: create AlarmConditionState for each alarm attribute
-                if (_alarmTrackingEnabled) foreach (var obj in sorted)
+                if (_alarmTrackingEnabled)
+                    foreach (var obj in sorted)
                     {
                         if (obj.IsArea) continue;
                         if (!attrsByObject.TryGetValue(obj.GobjectId, out var objAttrs)) continue;
 
                         var hasAlarms = false;
-                    var alarmAttrs = objAttrs.Where(a => a.IsAlarm && string.IsNullOrEmpty(a.PrimitiveName)).ToList();
+                        var alarmAttrs = objAttrs.Where(a => a.IsAlarm && string.IsNullOrEmpty(a.PrimitiveName))
+                            .ToList();
                         foreach (var alarmAttr in alarmAttrs)
                         {
                             var inAlarmTagRef = alarmAttr.FullTagReference.TrimEnd('[', ']') + ".InAlarm";
@@ -450,7 +365,8 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
                 _lastHierarchy = new List<GalaxyObjectInfo>(hierarchy);
                 _lastAttributes = new List<GalaxyAttributeInfo>(attributes);
 
-                Log.Information("Address space built: {Objects} objects, {Variables} variables, {Mappings} tag references, {Alarms} alarm tags",
+                Log.Information(
+                    "Address space built: {Objects} objects, {Variables} variables, {Mappings} tag references, {Alarms} alarm tags",
                     ObjectNodeCount, VariableNodeCount, _nodeIdToTagReference.Count, _alarmInAlarmTags.Count);
             }
         }
@@ -460,7 +376,11 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
             foreach (var kvp in _alarmInAlarmTags)
             {
                 // Subscribe to InAlarm, Priority, and DescAttrName for each alarm
-                var tagsToSubscribe = new[] { kvp.Key, kvp.Value.PriorityTagReference, kvp.Value.DescAttrNameTagReference, kvp.Value.AckedTagReference };
+                var tagsToSubscribe = new[]
+                {
+                    kvp.Key, kvp.Value.PriorityTagReference, kvp.Value.DescAttrNameTagReference,
+                    kvp.Value.AckedTagReference
+                };
                 foreach (var tag in tagsToSubscribe)
                 {
                     if (string.IsNullOrEmpty(tag) || !_tagToVariableNode.ContainsKey(tag))
@@ -510,9 +430,9 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
             if (condition == null)
                 return;
 
-            ushort severity = info.CachedSeverity;
+            var severity = info.CachedSeverity;
-            string message = active
+            var message = active
-                ? (!string.IsNullOrEmpty(info.CachedMessage) ? info.CachedMessage : $"Alarm active: {info.SourceName}")
+                ? !string.IsNullOrEmpty(info.CachedMessage) ? info.CachedMessage : $"Alarm active: {info.SourceName}"
                 : $"Alarm cleared: {info.SourceName}";
 
             // Set a new EventId so clients can reference this event for acknowledge
@@ -523,7 +443,7 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
             condition.SetSeverity(SystemContext, (EventSeverity)severity);
 
             // Retain while active or unacknowledged
-            condition.Retain.Value = active || (condition.AckedState?.Id?.Value == false);
+            condition.Retain.Value = active || condition.AckedState?.Id?.Value == false;
 
             // Reset acknowledged state when alarm activates
             if (active)
@@ -584,16 +504,10 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
                 // Snapshot subscriptions for changed tags before teardown
                 var affectedSubscriptions = new Dictionary<string, int>(StringComparer.OrdinalIgnoreCase);
                 foreach (var id in changedIds)
-                {
                     if (_gobjectToTagRefs.TryGetValue(id, out var tagRefs))
-                    {
                         foreach (var tagRef in tagRefs)
-                        {
                             if (_subscriptionRefCounts.TryGetValue(tagRef, out var count))
                                 affectedSubscriptions[tagRef] = count;
-                        }
-                    }
-                }
 
                 // Tear down changed subtrees
                 TearDownGobjects(changedIds);
@@ -640,8 +554,15 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
                         // Unsubscribe if actively subscribed
                         if (_subscriptionRefCounts.ContainsKey(tagRef))
                         {
-                            try { _mxAccessClient.UnsubscribeAsync(tagRef).GetAwaiter().GetResult(); }
+                            try
-                            catch { /* ignore */ }
+                            {
+                                _mxAccessClient.UnsubscribeAsync(tagRef).GetAwaiter().GetResult();
+                            }
+                            catch
+                            {
+                                /* ignore */
+                            }
+
                             _subscriptionRefCounts.Remove(tagRef);
                         }
 
@@ -654,14 +575,18 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
                         {
                             var info = _alarmInAlarmTags[alarmKey];
                             // Unsubscribe alarm auto-subscriptions
-                            foreach (var alarmTag in new[] { alarmKey, info.PriorityTagReference, info.DescAttrNameTagReference })
+                            foreach (var alarmTag in new[]
-                            {
+                                         { alarmKey, info.PriorityTagReference, info.DescAttrNameTagReference })
                                 if (!string.IsNullOrEmpty(alarmTag))
+                                    try
                                     {
-                                    try { _mxAccessClient.UnsubscribeAsync(alarmTag).GetAwaiter().GetResult(); }
+                                        _mxAccessClient.UnsubscribeAsync(alarmTag).GetAwaiter().GetResult();
-                                    catch { /* ignore */ }
                                     }
+                                    catch
+                                    {
+                                        /* ignore */
                                     }
+
                             _alarmInAlarmTags.Remove(alarmKey);
                             if (!string.IsNullOrEmpty(info.AckedTagReference))
                                 _alarmAckedTags.Remove(info.AckedTagReference);
@@ -670,8 +595,15 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
                         // Delete variable node
                         if (_tagToVariableNode.TryGetValue(tagRef, out var variable))
                         {
-                            try { DeleteNode(SystemContext, variable.NodeId); }
+                            try
-                            catch { /* ignore */ }
+                            {
+                                DeleteNode(SystemContext, variable.NodeId);
+                            }
+                            catch
+                            {
+                                /* ignore */
+                            }
+
                             _tagToVariableNode.Remove(tagRef);
                         }
 
@@ -683,14 +615,22 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
 
                         VariableNodeCount--;
                     }
+
                     _gobjectToTagRefs.Remove(id);
                 }
 
                 // Delete the object/folder node itself
                 if (_nodeMap.TryGetValue(id, out var objNode))
                 {
-                    try { DeleteNode(SystemContext, objNode.NodeId); }
+                    try
-                    catch { /* ignore */ }
+                    {
+                        DeleteNode(SystemContext, objNode.NodeId);
+                    }
+                    catch
+                    {
+                        /* ignore */
+                    }
+
                     _nodeMap.Remove(id);
                     if (!(objNode is FolderState))
                         ObjectNodeCount--;
@@ -782,14 +722,12 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
 
                     var directGroup = byPrimitive.FirstOrDefault(g => string.IsNullOrEmpty(g.Key));
                     if (directGroup != null)
-                    {
                         foreach (var attr in directGroup)
                         {
                             var variable = CreateAttributeVariable(node, attr);
                             if (primitiveGroupNames.Contains(attr.AttributeName))
                                 variableNodes[attr.AttributeName] = variable;
                         }
-                    }
 
                     foreach (var group in byPrimitive)
                     {
@@ -809,10 +747,7 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
                             parentForAttrs = primNode;
                         }
 
-                        foreach (var attr in group)
+                        foreach (var attr in group) CreateAttributeVariable(parentForAttrs, attr);
-                        {
-                            CreateAttributeVariable(parentForAttrs, attr);
-                        }
                     }
                 }
             }
@@ -897,12 +832,19 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
                     if (ownerAttr == null || !gobjectIds.Contains(ownerAttr.GobjectId))
                         continue;
 
-                    foreach (var tag in new[] { kvp.Key, kvp.Value.PriorityTagReference, kvp.Value.DescAttrNameTagReference })
+                    foreach (var tag in new[]
+                                 { kvp.Key, kvp.Value.PriorityTagReference, kvp.Value.DescAttrNameTagReference })
                     {
                         if (string.IsNullOrEmpty(tag) || !_tagToVariableNode.ContainsKey(tag))
                             continue;
-                        try { _mxAccessClient.SubscribeAsync(tag, (_, _) => { }); }
+                        try
-                        catch { /* ignore */ }
+                        {
+                            _mxAccessClient.SubscribeAsync(tag, (_, _) => { });
+                        }
+                        catch
+                        {
+                            /* ignore */
+                        }
                     }
                 }
             }
@@ -945,17 +887,12 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
             variable.NodeId = new NodeId(nodeIdString, NamespaceIndex);
 
             if (attr.IsArray && attr.ArrayDimension.HasValue)
-            {
                 variable.ArrayDimensions = new ReadOnlyList<uint>(new List<uint> { (uint)attr.ArrayDimension.Value });
-            }
 
             var accessLevel = SecurityClassificationMapper.IsWritable(attr.SecurityClassification)
                 ? AccessLevels.CurrentReadOrWrite
                 : AccessLevels.CurrentRead;
-            if (attr.IsHistorized)
+            if (attr.IsHistorized) accessLevel |= AccessLevels.HistoryRead;
-            {
-                accessLevel |= AccessLevels.HistoryRead;
-            }
             variable.AccessLevel = accessLevel;
             variable.UserAccessLevel = accessLevel;
             variable.Historizing = attr.IsHistorized;
@@ -980,6 +917,7 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
                 tagList = new List<string>();
                 _gobjectToTagRefs[attr.GobjectId] = tagList;
             }
+
             tagList.Add(attr.FullTagReference);
 
             VariableNodeCount++;
@@ -1034,7 +972,8 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
             return obj;
         }
 
-        private BaseDataVariableState CreateVariable(NodeState parent, string path, string name, NodeId dataType, int valueRank)
+        private BaseDataVariableState CreateVariable(NodeState parent, string path, string name, NodeId dataType,
+            int valueRank)
         {
             var variable = new BaseDataVariableState(parent)
             {
@@ -1059,6 +998,110 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
             return variable;
         }
 
+        #region Condition Refresh
+
+        /// <inheritdoc />
+        /// <param name="context">The OPC UA request context for the condition refresh operation.</param>
+        /// <param name="monitoredItems">The monitored event items that should receive retained alarm conditions.</param>
+        public override ServiceResult ConditionRefresh(OperationContext context,
+            IList<IEventMonitoredItem> monitoredItems)
+        {
+            foreach (var kvp in _alarmInAlarmTags)
+            {
+                var info = kvp.Value;
+                if (info.ConditionNode == null || info.ConditionNode.Retain?.Value != true)
+                    continue;
+
+                foreach (var item in monitoredItems) item.QueueEvent(info.ConditionNode);
+            }
+
+            return ServiceResult.Good;
+        }
+
+        #endregion
+
+        private sealed class TagMetadata
+        {
+            /// <summary>
+            ///     Gets or sets the MXAccess data type code used to map Galaxy values into OPC UA variants.
+            /// </summary>
+            public int MxDataType { get; set; }
+
+            /// <summary>
+            ///     Gets or sets a value indicating whether the source Galaxy attribute should be exposed as an array node.
+            /// </summary>
+            public bool IsArray { get; set; }
+
+            /// <summary>
+            ///     Gets or sets the declared array length from Galaxy metadata when the attribute is modeled as an array.
+            /// </summary>
+            public int? ArrayDimension { get; set; }
+
+            /// <summary>
+            ///     Gets or sets the Galaxy security classification (0=FreeAccess, 1=Operate, 4=Tune, 5=Configure, etc.).
+            ///     Used at write time to determine which write role is required.
+            /// </summary>
+            public int SecurityClassification { get; set; }
+        }
+
+        private sealed class AlarmInfo
+        {
+            /// <summary>
+            ///     Gets or sets the full tag reference for the process value whose alarm state is tracked.
+            /// </summary>
+            public string SourceTagReference { get; set; } = "";
+
+            /// <summary>
+            ///     Gets or sets the OPC UA node identifier for the source variable that owns the alarm condition.
+            /// </summary>
+            public NodeId SourceNodeId { get; set; } = NodeId.Null;
+
+            /// <summary>
+            ///     Gets or sets the operator-facing source name used in generated alarm events.
+            /// </summary>
+            public string SourceName { get; set; } = "";
+
+            /// <summary>
+            ///     Gets or sets the most recent in-alarm state so duplicate transitions are not reissued.
+            /// </summary>
+            public bool LastInAlarm { get; set; }
+
+            /// <summary>
+            ///     Gets or sets the retained OPC UA condition node associated with the source alarm.
+            /// </summary>
+            public AlarmConditionState? ConditionNode { get; set; }
+
+            /// <summary>
+            ///     Gets or sets the Galaxy tag reference that supplies runtime alarm priority updates.
+            /// </summary>
+            public string PriorityTagReference { get; set; } = "";
+
+            /// <summary>
+            ///     Gets or sets the Galaxy tag reference or attribute binding used to resolve the alarm message text.
+            /// </summary>
+            public string DescAttrNameTagReference { get; set; } = "";
+
+            /// <summary>
+            ///     Gets or sets the cached OPC UA severity derived from the latest alarm priority value.
+            /// </summary>
+            public ushort CachedSeverity { get; set; }
+
+            /// <summary>
+            ///     Gets or sets the cached alarm message used when emitting active and cleared events.
+            /// </summary>
+            public string CachedMessage { get; set; } = "";
+
+            /// <summary>
+            ///     Gets or sets the Galaxy tag reference for the alarm acknowledged state.
+            /// </summary>
+            public string AckedTagReference { get; set; } = "";
+
+            /// <summary>
+            ///     Gets or sets the Galaxy tag reference for the acknowledge message that triggers acknowledgment.
+            /// </summary>
+            public string AckMsgTagReference { get; set; } = "";
+        }
+
         #region Read/Write Handlers
 
         /// <inheritdoc />
@@ -1067,7 +1110,7 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
         {
             base.Read(context, maxAge, nodesToRead, results, errors);
 
-            for (int i = 0; i < nodesToRead.Count; i++)
+            for (var i = 0; i < nodesToRead.Count; i++)
             {
                 if (nodesToRead[i].AttributeId != Attributes.Value)
                     continue;
@@ -1079,7 +1122,6 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
                 if (nodeIdStr == null) continue;
 
                 if (_nodeIdToTagReference.TryGetValue(nodeIdStr, out var tagRef))
-                {
                     try
                     {
                         var vtq = _mxAccessClient.ReadAsync(tagRef).GetAwaiter().GetResult();
@@ -1093,7 +1135,6 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
                     }
             }
         }
-        }
 
         /// <inheritdoc />
         public override void Write(OperationContext context, IList<WriteValue> nodesToWrite,
@@ -1101,7 +1142,7 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
         {
             base.Write(context, nodesToWrite, errors);
 
-            for (int i = 0; i < nodesToWrite.Count; i++)
+            for (var i = 0; i < nodesToWrite.Count; i++)
             {
                 if (nodesToWrite[i].AttributeId != Attributes.Value)
                     continue;
@@ -1217,14 +1258,14 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
 
         private static void EnableEventNotifierUpChain(NodeState node)
         {
-            for (var current = node as BaseInstanceState; current != null; current = current.Parent as BaseInstanceState)
+            for (var current = node as BaseInstanceState;
-            {
+                 current != null;
+                 current = current.Parent as BaseInstanceState)
                 if (current is BaseObjectState obj)
                     obj.EventNotifier = EventNotifiers.SubscribeToEvents;
                 else if (current is FolderState folder)
                     folder.EventNotifier = EventNotifiers.SubscribeToEvents;
         }
-        }
 
         private void ReportEventUpNotifierChain(BaseInstanceState sourceNode, IFilterTarget eventInstance)
         {
@@ -1232,14 +1273,16 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
                 current.ReportEvent(SystemContext, eventInstance);
         }
 
-        private bool TryApplyArrayElementWrite(string tagRef, object? writeValue, string indexRange, out object updatedArray)
+        private bool TryApplyArrayElementWrite(string tagRef, object? writeValue, string indexRange,
+            out object updatedArray)
         {
             updatedArray = null!;
 
             if (!int.TryParse(indexRange, out var index) || index < 0)
                 return false;
 
-            var currentValue = NormalizePublishedValue(tagRef, _mxAccessClient.ReadAsync(tagRef).GetAwaiter().GetResult().Value);
+            var currentValue =
+                NormalizePublishedValue(tagRef, _mxAccessClient.ReadAsync(tagRef).GetAwaiter().GetResult().Value);
             if (currentValue is not Array currentArray || currentArray.Rank != 1 || index >= currentArray.Length)
                 return false;
 
@@ -1305,7 +1348,8 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
             if (value != null)
                 return value;
 
-            if (!_tagMetadata.TryGetValue(tagRef, out var metadata) || !metadata.IsArray || !metadata.ArrayDimension.HasValue)
+            if (!_tagMetadata.TryGetValue(tagRef, out var metadata) || !metadata.IsArray ||
+                !metadata.ArrayDimension.HasValue)
                 return null;
 
             return CreateDefaultArrayValue(metadata);
@@ -1317,40 +1361,14 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
             var values = Array.CreateInstance(elementType, metadata.ArrayDimension!.Value);
 
             if (elementType == typeof(string))
-            {
+                for (var i = 0; i < values.Length; i++)
-                for (int i = 0; i < values.Length; i++)
                     values.SetValue(string.Empty, i);
-            }
 
             return values;
         }
 
         #endregion
 
-        #region Condition Refresh
-
-        /// <inheritdoc />
-        /// <param name="context">The OPC UA request context for the condition refresh operation.</param>
-        /// <param name="monitoredItems">The monitored event items that should receive retained alarm conditions.</param>
-        public override ServiceResult ConditionRefresh(OperationContext context, IList<IEventMonitoredItem> monitoredItems)
-        {
-            foreach (var kvp in _alarmInAlarmTags)
-            {
-                var info = kvp.Value;
-                if (info.ConditionNode == null || info.ConditionNode.Retain?.Value != true)
-                    continue;
-
-                foreach (var item in monitoredItems)
-                {
-                    item.QueueEvent(info.ConditionNode);
-                }
-            }
-
-            return ServiceResult.Good;
-        }
-
-        #endregion
-
         #region HistoryRead
 
         /// <inheritdoc />
@@ -1481,7 +1499,8 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
         ///     can arrive before the initial publish to the client.
         /// </summary>
         /// <inheritdoc />
-        protected override void OnMonitoredItemCreated(ServerSystemContext context, NodeHandle handle, MonitoredItem monitoredItem)
+        protected override void OnMonitoredItemCreated(ServerSystemContext context, NodeHandle handle,
+            MonitoredItem monitoredItem)
         {
             base.OnMonitoredItemCreated(context, handle, monitoredItem);
 
@@ -1495,7 +1514,8 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
         ///     Decrements ref-counted MXAccess subscriptions.
         /// </summary>
         /// <inheritdoc />
-        protected override void OnDeleteMonitoredItemsComplete(ServerSystemContext context, IList<IMonitoredItem> monitoredItems)
+        protected override void OnDeleteMonitoredItemsComplete(ServerSystemContext context,
+            IList<IMonitoredItem> monitoredItems)
         {
             foreach (var item in monitoredItems)
             {
@@ -1510,7 +1530,8 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
         ///     Rebuilds MXAccess subscription bookkeeping when transferred items arrive without local in-memory state.
         /// </summary>
         /// <inheritdoc />
-        protected override void OnMonitoredItemsTransferred(ServerSystemContext context, IList<IMonitoredItem> monitoredItems)
+        protected override void OnMonitoredItemsTransferred(ServerSystemContext context,
+            IList<IMonitoredItem> monitoredItems)
         {
             base.OnMonitoredItemsTransferred(context, monitoredItems);
 
@@ -1531,7 +1552,8 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
         }
 
         /// <summary>
-        /// Increments the subscription reference count for a Galaxy tag and opens the runtime subscription when the first OPC UA monitored item appears.
+        ///     Increments the subscription reference count for a Galaxy tag and opens the runtime subscription when the first OPC
+        ///     UA monitored item appears.
         /// </summary>
         /// <param name="fullTagReference">The fully qualified Galaxy tag reference to subscribe.</param>
         internal void SubscribeTag(string fullTagReference)
@@ -1555,7 +1577,8 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
         }
 
         /// <summary>
-        /// Decrements the subscription reference count for a Galaxy tag and closes the runtime subscription when no OPC UA monitored items remain.
+        ///     Decrements the subscription reference count for a Galaxy tag and closes the runtime subscription when no OPC UA
+        ///     monitored items remain.
         /// </summary>
         /// <param name="fullTagReference">The fully qualified Galaxy tag reference to unsubscribe.</param>
         internal void UnsubscribeTag(string fullTagReference)
@@ -1594,7 +1617,6 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
 
             var tagsToSubscribe = new List<string>();
             foreach (var kvp in transferredCounts)
-            {
                 lock (Lock)
                 {
                     if (_subscriptionRefCounts.ContainsKey(kvp.Key))
@@ -1603,7 +1625,6 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
                     _subscriptionRefCounts[kvp.Key] = kvp.Value;
                     tagsToSubscribe.Add(kvp.Key);
                 }
-            }
 
             foreach (var tagRef in tagsToSubscribe)
                 _ = _mxAccessClient.SubscribeAsync(tagRef, (_, _) => { });
@@ -1653,7 +1674,6 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
             Log.Information("Data change dispatch thread started");
 
             while (_dispatchRunning)
-            {
                 try
                 {
                     _dataChangeSignal.WaitOne(TimeSpan.FromMilliseconds(100));
@@ -1669,8 +1689,10 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
                     }
 
                     // Prepare updates outside the Lock. Shared-state lookups stay inside the Lock.
-                    var updates = new List<(string address, BaseDataVariableState variable, DataValue dataValue)>(keys.Count);
+                    var updates =
-                    var pendingAlarmEvents = new List<(string address, AlarmInfo info, bool active, ushort? severity, string? message)>();
+                        new List<(string address, BaseDataVariableState variable, DataValue dataValue)>(keys.Count);
+                    var pendingAlarmEvents =
+                        new List<(string address, AlarmInfo info, bool active, ushort? severity, string? message)>();
                     var pendingAckedEvents = new List<(AlarmInfo info, bool acked)>();
 
                     foreach (var address in keys)
@@ -1680,13 +1702,12 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
 
                         AlarmInfo? alarmInfo = null;
                         AlarmInfo? ackedAlarmInfo = null;
-                        bool newInAlarm = false;
+                        var newInAlarm = false;
-                        bool newAcked = false;
+                        var newAcked = false;
 
                         lock (Lock)
                         {
                             if (_tagToVariableNode.TryGetValue(address, out var variable))
-                            {
                                 try
                                 {
                                     var dataValue = CreatePublishedDataValue(address, vtq);
@@ -1696,11 +1717,11 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
                                 {
                                     Log.Warning(ex, "Error preparing data change for {Address}", address);
                                 }
-                            }
 
                             if (_alarmInAlarmTags.TryGetValue(address, out alarmInfo))
                             {
-                                newInAlarm = vtq.Value is true || vtq.Value is 1 || (vtq.Value is int intVal && intVal != 0);
+                                newInAlarm = vtq.Value is true || vtq.Value is 1 ||
+                                             (vtq.Value is int intVal && intVal != 0);
                                 if (newInAlarm == alarmInfo.LastInAlarm)
                                     alarmInfo = null;
                             }
@@ -1708,7 +1729,8 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
                             // Check for Acked transitions
                             if (_alarmAckedTags.TryGetValue(address, out ackedAlarmInfo))
                             {
-                                newAcked = vtq.Value is true || vtq.Value is 1 || (vtq.Value is int ackedIntVal && ackedIntVal != 0);
+                                newAcked = vtq.Value is true || vtq.Value is 1 ||
+                                           (vtq.Value is int ackedIntVal && ackedIntVal != 0);
                                 pendingAckedEvents.Add((ackedAlarmInfo, newAcked));
                                 ackedAlarmInfo = null; // handled
                             }
@@ -1724,11 +1746,12 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
                         {
                             try
                             {
-                                var pVtq = _mxAccessClient.ReadAsync(alarmInfo.PriorityTagReference).GetAwaiter().GetResult();
+                                var pVtq = _mxAccessClient.ReadAsync(alarmInfo.PriorityTagReference).GetAwaiter()
+                                    .GetResult();
                                 if (pVtq.Value is int ip)
-                                    severity = (ushort)System.Math.Min(System.Math.Max(ip, 1), 1000);
+                                    severity = (ushort)Math.Min(Math.Max(ip, 1), 1000);
                                 else if (pVtq.Value is short sp)
-                                    severity = (ushort)System.Math.Min(System.Math.Max((int)sp, 1), 1000);
+                                    severity = (ushort)Math.Min(Math.Max((int)sp, 1), 1000);
                             }
                             catch
                             {
@@ -1737,7 +1760,8 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
 
                             try
                             {
-                                var dVtq = _mxAccessClient.ReadAsync(alarmInfo.DescAttrNameTagReference).GetAwaiter().GetResult();
+                                var dVtq = _mxAccessClient.ReadAsync(alarmInfo.DescAttrNameTagReference).GetAwaiter()
+                                    .GetResult();
                                 if (dVtq.Value is string desc && !string.IsNullOrEmpty(desc))
                                     message = desc;
                             }
@@ -1752,12 +1776,12 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
 
                     // Apply under Lock so ClearChangeMasks propagates to monitored items.
                     if (updates.Count > 0 || pendingAlarmEvents.Count > 0 || pendingAckedEvents.Count > 0)
-                    {
                         lock (Lock)
                         {
                             foreach (var (address, variable, dataValue) in updates)
                             {
-                                if (!_tagToVariableNode.TryGetValue(address, out var currentVariable) || !ReferenceEquals(currentVariable, variable))
+                                if (!_tagToVariableNode.TryGetValue(address, out var currentVariable) ||
+                                    !ReferenceEquals(currentVariable, variable))
                                     continue;
 
                                 variable.Value = dataValue.Value;
@@ -1768,7 +1792,8 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
 
                             foreach (var (address, info, active, severity, message) in pendingAlarmEvents)
                             {
-                                if (!_alarmInAlarmTags.TryGetValue(address, out var currentInfo) || !ReferenceEquals(currentInfo, info))
+                                if (!_alarmInAlarmTags.TryGetValue(address, out var currentInfo) ||
+                                    !ReferenceEquals(currentInfo, info))
                                     continue;
 
                                 if (currentInfo.LastInAlarm == active)
@@ -1799,7 +1824,7 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
                                 try
                                 {
                                     condition.SetAcknowledgedState(SystemContext, acked);
-                                    condition.Retain.Value = (condition.ActiveState?.Id?.Value == true) || !acked;
+                                    condition.Retain.Value = condition.ActiveState?.Id?.Value == true || !acked;
 
                                     if (_tagToVariableNode.TryGetValue(info.SourceTagReference, out var src))
                                         ReportEventUpNotifierChain(src, condition);
@@ -1813,7 +1838,6 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
                                 }
                             }
                         }
-                    }
 
                     Interlocked.Add(ref _totalDispatchBatchSize, updates.Count);
                     Interlocked.Increment(ref _dispatchCycleCount);
@@ -1823,7 +1847,6 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
                 {
                     Log.Error(ex, "Unhandled error in data change dispatch loop");
                 }
-            }
 
             Log.Information("Data change dispatch thread stopped");
         }
@@ -1848,8 +1871,8 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
             Interlocked.Exchange(ref _dispatchCycleCount, 0);
 
             _lastMetricsReportTime = now;
-            _lastEventsPerSecond = eventsPerSecond;
+            MxChangeEventsPerSecond = eventsPerSecond;
-            _lastAvgBatchSize = avgQueueSize;
+            AverageDispatchBatchSize = avgQueueSize;
 
             Log.Information(
                 "DataChange dispatch: EventsPerSec={EventsPerSec:F1}, AvgBatchSize={AvgBatchSize:F1}, PendingItems={Pending}, TotalEvents={Total}",

src/ZB.MOM.WW.LmxOpcUa.Host/OpcUa/LmxOpcUaServer.cs

@@ -1,6 +1,5 @@
 using System;
 using System.Collections.Generic;
-using System.Text;
 using Opc.Ua;
 using Opc.Ua.Server;
 using Serilog;
@@ -18,43 +17,24 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
     public class LmxOpcUaServer : StandardServer
     {
         private static readonly ILogger Log = Serilog.Log.ForContext<LmxOpcUaServer>();
-
-        private readonly string _galaxyName;
-        private readonly IMxAccessClient _mxAccessClient;
-        private readonly PerformanceMetrics _metrics;
-        private readonly HistorianDataSource? _historianDataSource;
         private readonly bool _alarmTrackingEnabled;
+        private readonly string? _applicationUri;
         private readonly AuthenticationConfiguration _authConfig;
         private readonly IUserAuthenticationProvider? _authProvider;
+
+        private readonly string _galaxyName;
+        private readonly HistorianDataSource? _historianDataSource;
+        private readonly PerformanceMetrics _metrics;
+        private readonly IMxAccessClient _mxAccessClient;
         private readonly RedundancyConfiguration _redundancyConfig;
-        private readonly string? _applicationUri;
+        private readonly ServiceLevelCalculator _serviceLevelCalculator = new();
-        private readonly ServiceLevelCalculator _serviceLevelCalculator = new ServiceLevelCalculator();
+        private NodeId? _alarmAckRoleId;
 
         // Resolved custom role NodeIds (populated in CreateMasterNodeManager)
         private NodeId? _readOnlyRoleId;
+        private NodeId? _writeConfigureRoleId;
         private NodeId? _writeOperateRoleId;
         private NodeId? _writeTuneRoleId;
-        private NodeId? _writeConfigureRoleId;
-        private NodeId? _alarmAckRoleId;
-
-        private LmxNodeManager? _nodeManager;
-
-        /// <summary>
-        /// Gets the custom node manager that publishes the Galaxy-backed namespace.
-        /// </summary>
-        public LmxNodeManager? NodeManager => _nodeManager;
-
-        /// <summary>
-        /// Gets the number of active OPC UA sessions currently connected to the server.
-        /// </summary>
-        public int ActiveSessionCount
-        {
-            get
-            {
-                try { return ServerInternal?.SessionManager?.GetSessions()?.Count ?? 0; }
-                catch { return 0; }
-            }
-        }
 
         public LmxOpcUaServer(string galaxyName, IMxAccessClient mxAccessClient, PerformanceMetrics metrics,
             HistorianDataSource? historianDataSource = null, bool alarmTrackingEnabled = false,
@@ -72,18 +52,42 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
             _applicationUri = applicationUri;
         }
 
+        /// <summary>
+        ///     Gets the custom node manager that publishes the Galaxy-backed namespace.
+        /// </summary>
+        public LmxNodeManager? NodeManager { get; private set; }
+
+        /// <summary>
+        ///     Gets the number of active OPC UA sessions currently connected to the server.
+        /// </summary>
+        public int ActiveSessionCount
+        {
+            get
+            {
+                try
+                {
+                    return ServerInternal?.SessionManager?.GetSessions()?.Count ?? 0;
+                }
+                catch
+                {
+                    return 0;
+                }
+            }
+        }
+
         /// <inheritdoc />
-        protected override MasterNodeManager CreateMasterNodeManager(IServerInternal server, ApplicationConfiguration configuration)
+        protected override MasterNodeManager CreateMasterNodeManager(IServerInternal server,
+            ApplicationConfiguration configuration)
         {
             // Resolve custom role NodeIds from the roles namespace
             ResolveRoleNodeIds(server);
 
             var namespaceUri = $"urn:{_galaxyName}:LmxOpcUa";
-            _nodeManager = new LmxNodeManager(server, configuration, namespaceUri, _mxAccessClient, _metrics,
+            NodeManager = new LmxNodeManager(server, configuration, namespaceUri, _mxAccessClient, _metrics,
                 _historianDataSource, _alarmTrackingEnabled, _authConfig.AnonymousCanWrite,
                 _writeOperateRoleId, _writeTuneRoleId, _writeConfigureRoleId, _alarmAckRoleId);
 
-            var nodeManagers = new List<INodeManager> { _nodeManager };
+            var nodeManagers = new List<INodeManager> { NodeManager };
             return new MasterNodeManager(server, configuration, null, nodeManagers.ToArray());
         }
 
@@ -136,11 +140,13 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
                     {
                         serverUriArrayNode.Value = _redundancyConfig.ServerUris.ToArray();
                         serverUriArrayNode.ClearChangeMasks(server.DefaultSystemContext, false);
-                        Log.Information("Set ServerUriArray to [{Uris}]", string.Join(", ", _redundancyConfig.ServerUris));
+                        Log.Information("Set ServerUriArray to [{Uris}]",
+                            string.Join(", ", _redundancyConfig.ServerUris));
                     }
                     else
                     {
-                        Log.Warning("ServerUriArray node not found in address space — SDK may not expose it for RedundancySupport.None base type");
+                        Log.Warning(
+                            "ServerUriArray node not found in address space — SDK may not expose it for RedundancySupport.None base type");
                     }
                 }
 
@@ -151,7 +157,8 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
             }
             catch (Exception ex)
             {
-                Log.Warning(ex, "Failed to configure redundancy nodes — redundancy state may not be visible to clients");
+                Log.Warning(ex,
+                    "Failed to configure redundancy nodes — redundancy state may not be visible to clients");
             }
         }
 
@@ -164,10 +171,7 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
             var level = CalculateCurrentServiceLevel(mxAccessConnected, dbConnected);
             try
             {
-                if (ServerInternal != null)
+                if (ServerInternal != null) SetServiceLevelValue(ServerInternal, level);
-                {
-                    SetServiceLevelValue(ServerInternal, level);
-                }
             }
             catch (Exception ex)
             {
@@ -206,7 +210,8 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
             if (args.NewIdentity is AnonymousIdentityToken anonymousToken)
             {
                 if (!_authConfig.AllowAnonymous)
-                    throw new ServiceResultException(StatusCodes.BadIdentityTokenRejected, "Anonymous access is disabled");
+                    throw new ServiceResultException(StatusCodes.BadIdentityTokenRejected,
+                        "Anonymous access is disabled");
 
                 args.Identity = new RoleBasedIdentity(
                     new UserIdentity(anonymousToken),
@@ -232,26 +237,26 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
                     var appRoles = roleProvider.GetUserRoles(userNameToken.UserName);
 
                     foreach (var appRole in appRoles)
-                    {
                         switch (appRole)
                         {
                             case AppRoles.ReadOnly:
                                 if (_readOnlyRoleId != null) roles.Add(new Role(_readOnlyRoleId, AppRoles.ReadOnly));
                                 break;
                             case AppRoles.WriteOperate:
-                                if (_writeOperateRoleId != null) roles.Add(new Role(_writeOperateRoleId, AppRoles.WriteOperate));
+                                if (_writeOperateRoleId != null)
+                                    roles.Add(new Role(_writeOperateRoleId, AppRoles.WriteOperate));
                                 break;
                             case AppRoles.WriteTune:
                                 if (_writeTuneRoleId != null) roles.Add(new Role(_writeTuneRoleId, AppRoles.WriteTune));
                                 break;
                             case AppRoles.WriteConfigure:
-                                if (_writeConfigureRoleId != null) roles.Add(new Role(_writeConfigureRoleId, AppRoles.WriteConfigure));
+                                if (_writeConfigureRoleId != null)
+                                    roles.Add(new Role(_writeConfigureRoleId, AppRoles.WriteConfigure));
                                 break;
                             case AppRoles.AlarmAck:
                                 if (_alarmAckRoleId != null) roles.Add(new Role(_alarmAckRoleId, AppRoles.AlarmAck));
                                 break;
                         }
-                    }
 
                     Log.Information("User {Username} authenticated with roles [{Roles}]",
                         userNameToken.UserName, string.Join(", ", appRoles));
@@ -279,7 +284,7 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
                 ProductUri = $"urn:{_galaxyName}:LmxOpcUa",
                 SoftwareVersion = GetType().Assembly.GetName().Version?.ToString() ?? "1.0.0",
                 BuildNumber = "1",
-                BuildDate = System.DateTime.UtcNow
+                BuildDate = DateTime.UtcNow
             };
             return properties;
         }

src/ZB.MOM.WW.LmxOpcUa.Host/OpcUa/OpcUaServerHost.cs

@@ -1,8 +1,8 @@
 using System;
+using System.IO;
 using System.Threading.Tasks;
 using Opc.Ua;
 using Opc.Ua.Configuration;
-using Opc.Ua.Server;
 using Serilog;
 using ZB.MOM.WW.LmxOpcUa.Host.Configuration;
 using ZB.MOM.WW.LmxOpcUa.Host.Domain;
@@ -17,39 +17,18 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
     public class OpcUaServerHost : IDisposable
     {
         private static readonly ILogger Log = Serilog.Log.ForContext<OpcUaServerHost>();
-
-        private readonly OpcUaConfiguration _config;
-        private readonly IMxAccessClient _mxAccessClient;
-        private readonly PerformanceMetrics _metrics;
-        private readonly HistorianDataSource? _historianDataSource;
         private readonly AuthenticationConfiguration _authConfig;
         private readonly IUserAuthenticationProvider? _authProvider;
-        private readonly SecurityProfileConfiguration _securityConfig;
+
+        private readonly OpcUaConfiguration _config;
+        private readonly HistorianDataSource? _historianDataSource;
+        private readonly PerformanceMetrics _metrics;
+        private readonly IMxAccessClient _mxAccessClient;
         private readonly RedundancyConfiguration _redundancyConfig;
+        private readonly SecurityProfileConfiguration _securityConfig;
         private ApplicationInstance? _application;
         private LmxOpcUaServer? _server;
 
-        /// <summary>
-        /// Gets the active node manager that holds the published Galaxy namespace.
-        /// </summary>
-        public LmxNodeManager? NodeManager => _server?.NodeManager;
-
-        /// <summary>
-        /// Gets the number of currently connected OPC UA client sessions.
-        /// </summary>
-        public int ActiveSessionCount => _server?.ActiveSessionCount ?? 0;
-
-        /// <summary>
-        /// Gets a value indicating whether the OPC UA server has been started and not yet stopped.
-        /// </summary>
-        public bool IsRunning => _server != null;
-
-        /// <summary>
-        /// Updates the OPC UA ServiceLevel based on current runtime health.
-        /// </summary>
-        public void UpdateServiceLevel(bool mxAccessConnected, bool dbConnected) =>
-            _server?.UpdateServiceLevel(mxAccessConnected, dbConnected);
-
         /// <summary>
         ///     Initializes a new host for the Galaxy-backed OPC UA server instance.
         /// </summary>
@@ -75,7 +54,39 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
         }
 
         /// <summary>
-        /// Starts the OPC UA application instance, prepares certificates, and binds the Galaxy namespace to the configured endpoint.
+        ///     Gets the active node manager that holds the published Galaxy namespace.
+        /// </summary>
+        public LmxNodeManager? NodeManager => _server?.NodeManager;
+
+        /// <summary>
+        ///     Gets the number of currently connected OPC UA client sessions.
+        /// </summary>
+        public int ActiveSessionCount => _server?.ActiveSessionCount ?? 0;
+
+        /// <summary>
+        ///     Gets a value indicating whether the OPC UA server has been started and not yet stopped.
+        /// </summary>
+        public bool IsRunning => _server != null;
+
+        /// <summary>
+        ///     Stops the host and releases server resources.
+        /// </summary>
+        public void Dispose()
+        {
+            Stop();
+        }
+
+        /// <summary>
+        ///     Updates the OPC UA ServiceLevel based on current runtime health.
+        /// </summary>
+        public void UpdateServiceLevel(bool mxAccessConnected, bool dbConnected)
+        {
+            _server?.UpdateServiceLevel(mxAccessConnected, dbConnected);
+        }
+
+        /// <summary>
+        ///     Starts the OPC UA application instance, prepares certificates, and binds the Galaxy namespace to the configured
+        ///     endpoint.
         /// </summary>
         public async Task StartAsync()
         {
@@ -85,12 +96,10 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
             // Resolve configured security profiles
             var securityPolicies = SecurityProfileResolver.Resolve(_securityConfig.Profiles);
             foreach (var sp in securityPolicies)
-            {
                 Log.Information("Security profile active: {PolicyUri} / {Mode}", sp.SecurityPolicyUri, sp.SecurityMode);
-            }
 
             // Build PKI paths
-            var pkiRoot = _securityConfig.PkiRootPath ?? System.IO.Path.Combine(
+            var pkiRoot = _securityConfig.PkiRootPath ?? Path.Combine(
                 Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData),
                 "OPC Foundation", "pki");
             var certSubject = _securityConfig.CertificateSubject ?? $"CN={_config.ServerName}, O=ZB MOM, DC=localhost";
@@ -111,23 +120,23 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
                 ApplicationCertificate = new CertificateIdentifier
                 {
                     StoreType = CertificateStoreType.Directory,
-                    StorePath = System.IO.Path.Combine(pkiRoot, "own"),
+                    StorePath = Path.Combine(pkiRoot, "own"),
                     SubjectName = certSubject
                 },
                 TrustedIssuerCertificates = new CertificateTrustList
                 {
                     StoreType = CertificateStoreType.Directory,
-                    StorePath = System.IO.Path.Combine(pkiRoot, "issuer")
+                    StorePath = Path.Combine(pkiRoot, "issuer")
                 },
                 TrustedPeerCertificates = new CertificateTrustList
                 {
                     StoreType = CertificateStoreType.Directory,
-                    StorePath = System.IO.Path.Combine(pkiRoot, "trusted")
+                    StorePath = Path.Combine(pkiRoot, "trusted")
                 },
                 RejectedCertificateStore = new CertificateTrustList
                 {
                     StoreType = CertificateStoreType.Directory,
-                    StorePath = System.IO.Path.Combine(pkiRoot, "rejected")
+                    StorePath = Path.Combine(pkiRoot, "rejected")
                 },
                 AutoAcceptUntrustedCertificates = _securityConfig.AutoAcceptClientCertificates,
                 RejectSHA1SignedCertificates = _securityConfig.RejectSHA1Certificates,
@@ -176,7 +185,7 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
 
             // Check/create application certificate
             var minKeySize = (ushort)_securityConfig.MinimumCertificateKeySize;
-            bool certOk = await _application.CheckApplicationInstanceCertificate(false, minKeySize);
+            var certOk = await _application.CheckApplicationInstanceCertificate(false, minKeySize);
             if (!certOk)
             {
                 Log.Warning("Application certificate check failed, attempting to create...");
@@ -187,7 +196,8 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
                 _config.AlarmTrackingEnabled, _authConfig, _authProvider, _redundancyConfig, applicationUri);
             await _application.Start(_server);
 
-            Log.Information("OPC UA server started on opc.tcp://{BindAddress}:{Port}{EndpointPath} (applicationUri={ApplicationUri}, namespace={Namespace})",
+            Log.Information(
+                "OPC UA server started on opc.tcp://{BindAddress}:{Port}{EndpointPath} (applicationUri={ApplicationUri}, namespace={Namespace})",
                 _config.BindAddress, _config.Port, _config.EndpointPath, applicationUri, namespaceUri);
         }
 
@@ -242,10 +252,5 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
 
             return policies;
         }
-
-        /// <summary>
-        /// Stops the host and releases server resources.
-        /// </summary>
-        public void Dispose() => Stop();
     }
 }

src/ZB.MOM.WW.LmxOpcUa.Host/OpcUa/RedundancyModeResolver.cs

@@ -1,19 +1,18 @@
-using System;
 using Opc.Ua;
 using Serilog;
 
 namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
 {
     /// <summary>
-    /// Maps a configured redundancy mode string to the OPC UA <see cref="RedundancySupport"/> enum.
+    ///     Maps a configured redundancy mode string to the OPC UA <see cref="RedundancySupport" /> enum.
     /// </summary>
     public static class RedundancyModeResolver
     {
         private static readonly ILogger Log = Serilog.Log.ForContext(typeof(RedundancyModeResolver));
 
         /// <summary>
-        /// Resolves the configured mode string to a <see cref="RedundancySupport"/> value.
+        ///     Resolves the configured mode string to a <see cref="RedundancySupport" /> value.
-        /// Returns <see cref="RedundancySupport.None"/> when redundancy is disabled or the mode is unrecognized.
+        ///     Returns <see cref="RedundancySupport.None" /> when redundancy is disabled or the mode is unrecognized.
         /// </summary>
         /// <param name="mode">The mode string from configuration (e.g., "Warm", "Hot").</param>
         /// <param name="enabled">Whether redundancy is enabled.</param>
@@ -31,9 +30,8 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
             };
 
             if (resolved == RedundancySupport.None)
-            {
+                Log.Warning("Unknown redundancy mode '{Mode}' — falling back to None. Supported modes: Warm, Hot",
-                Log.Warning("Unknown redundancy mode '{Mode}' — falling back to None. Supported modes: Warm, Hot", mode);
+                    mode);
-            }
 
             return resolved;
         }

src/ZB.MOM.WW.LmxOpcUa.Host/OpcUa/SecurityProfileResolver.cs

@@ -2,20 +2,19 @@ using System;
 using System.Collections.Generic;
 using System.Linq;
 using Opc.Ua;
-using Opc.Ua.Server;
 using Serilog;
 
 namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
 {
     /// <summary>
-    /// Maps configured security profile names to OPC UA <see cref="ServerSecurityPolicy"/> instances.
+    ///     Maps configured security profile names to OPC UA <see cref="ServerSecurityPolicy" /> instances.
     /// </summary>
     public static class SecurityProfileResolver
     {
         private static readonly ILogger Log = Serilog.Log.ForContext(typeof(SecurityProfileResolver));
 
         private static readonly Dictionary<string, ServerSecurityPolicy> KnownProfiles =
-            new Dictionary<string, ServerSecurityPolicy>(StringComparer.OrdinalIgnoreCase)
+            new(StringComparer.OrdinalIgnoreCase)
             {
                 ["None"] = new ServerSecurityPolicy
                 {
@@ -35,7 +34,12 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
             };
 
         /// <summary>
-        /// Resolves the configured profile names to <see cref="ServerSecurityPolicy"/> entries.
+        ///     Gets the list of valid profile names for validation and documentation.
+        /// </summary>
+        public static IReadOnlyCollection<string> ValidProfileNames => KnownProfiles.Keys.ToList().AsReadOnly();
+
+        /// <summary>
+        ///     Resolves the configured profile names to <see cref="ServerSecurityPolicy" /> entries.
         ///     Unknown names are skipped with a warning. An empty or fully-invalid list falls back to <c>None</c>.
         /// </summary>
         /// <param name="profileNames">The profile names from configuration.</param>
@@ -59,15 +63,11 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
                 }
 
                 if (KnownProfiles.TryGetValue(trimmed, out var policy))
-                {
                     resolved.Add(policy);
-                }
                 else
-                {
                     Log.Warning("Unknown security profile '{Profile}' — skipping. Valid profiles: {ValidProfiles}",
                         trimmed, string.Join(", ", KnownProfiles.Keys));
             }
-            }
 
             if (resolved.Count == 0)
             {
@@ -77,10 +77,5 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
 
             return resolved;
         }
-
-        /// <summary>
-        /// Gets the list of valid profile names for validation and documentation.
-        /// </summary>
-        public static IReadOnlyCollection<string> ValidProfileNames => KnownProfiles.Keys.ToList().AsReadOnly();
     }
 }

src/ZB.MOM.WW.LmxOpcUa.Host/OpcUa/ServiceLevelCalculator.cs

@@ -19,7 +19,7 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
             if (!mxAccessConnected && !dbConnected)
                 return 0;
 
-            int level = baseLevel;
+            var level = baseLevel;
 
             if (!mxAccessConnected)
                 level -= 100;

src/ZB.MOM.WW.LmxOpcUa.Host/OpcUaService.cs

@@ -1,10 +1,12 @@
 using System;
 using System.Threading;
+using System.Threading.Tasks;
 using Microsoft.Extensions.Configuration;
 using Serilog;
 using ZB.MOM.WW.LmxOpcUa.Host.Configuration;
 using ZB.MOM.WW.LmxOpcUa.Host.Domain;
 using ZB.MOM.WW.LmxOpcUa.Host.GalaxyRepository;
+using ZB.MOM.WW.LmxOpcUa.Host.Historian;
 using ZB.MOM.WW.LmxOpcUa.Host.Metrics;
 using ZB.MOM.WW.LmxOpcUa.Host.MxAccess;
 using ZB.MOM.WW.LmxOpcUa.Host.OpcUa;
@@ -18,27 +20,20 @@ namespace ZB.MOM.WW.LmxOpcUa.Host
     internal sealed class OpcUaService
     {
         private static readonly ILogger Log = Serilog.Log.ForContext<OpcUaService>();
+        private readonly IUserAuthenticationProvider? _authProviderOverride;
 
         private readonly AppConfiguration _config;
-        private readonly IMxProxy? _mxProxy;
         private readonly IGalaxyRepository? _galaxyRepository;
-        private readonly IMxAccessClient? _mxAccessClientOverride;
-        private readonly bool _hasMxAccessClientOverride;
-        private readonly IUserAuthenticationProvider? _authProviderOverride;
         private readonly bool _hasAuthProviderOverride;
+        private readonly bool _hasMxAccessClientOverride;
+        private readonly IMxAccessClient? _mxAccessClientOverride;
+        private readonly IMxProxy? _mxProxy;
 
         private CancellationTokenSource? _cts;
-        private PerformanceMetrics? _metrics;
+        private HealthCheckService? _healthCheck;
-        private StaComThread? _staThread;
         private MxAccessClient? _mxAccessClient;
         private IMxAccessClient? _mxAccessClientForWiring;
-        private ChangeDetectionService? _changeDetection;
+        private StaComThread? _staThread;
-        private OpcUaServerHost? _serverHost;
-        private LmxNodeManager? _nodeManager;
-        private HealthCheckService? _healthCheck;
-        private StatusReportService? _statusReport;
-        private StatusWebServer? _statusWebServer;
-        private GalaxyRepositoryStats? _galaxyStats;
 
         /// <summary>
         ///     Production constructor. Loads configuration from appsettings.json.
@@ -46,8 +41,10 @@ namespace ZB.MOM.WW.LmxOpcUa.Host
         public OpcUaService()
         {
             var configuration = new ConfigurationBuilder()
-                .AddJsonFile("appsettings.json", optional: false)
+                .AddJsonFile("appsettings.json", false)
-                .AddJsonFile($"appsettings.{Environment.GetEnvironmentVariable("DOTNET_ENVIRONMENT") ?? "Production"}.json", optional: true)
+                .AddJsonFile(
+                    $"appsettings.{Environment.GetEnvironmentVariable("DOTNET_ENVIRONMENT") ?? "Production"}.json",
+                    true)
                 .AddEnvironmentVariables()
                 .Build();
 
@@ -70,11 +67,23 @@ namespace ZB.MOM.WW.LmxOpcUa.Host
         /// <summary>
         ///     Test constructor. Accepts injected dependencies.
         /// </summary>
-        /// <param name="config">The service configuration used to shape OPC UA hosting, MXAccess connectivity, and dashboard behavior during the test run.</param>
+        /// <param name="config">
+        ///     The service configuration used to shape OPC UA hosting, MXAccess connectivity, and dashboard
+        ///     behavior during the test run.
+        /// </param>
         /// <param name="mxProxy">The MXAccess proxy substitute used when a test wants to exercise COM-style wiring.</param>
-        /// <param name="galaxyRepository">The repository substitute that supplies Galaxy hierarchy and deploy metadata for address-space builds.</param>
+        /// <param name="galaxyRepository">
-        /// <param name="mxAccessClientOverride">An optional direct MXAccess client substitute that bypasses STA thread setup and COM interop.</param>
+        ///     The repository substitute that supplies Galaxy hierarchy and deploy metadata for
-        /// <param name="hasMxAccessClientOverride">A value indicating whether the override client should be used instead of creating a client from <paramref name="mxProxy"/>.</param>
+        ///     address-space builds.
+        /// </param>
+        /// <param name="mxAccessClientOverride">
+        ///     An optional direct MXAccess client substitute that bypasses STA thread setup and
+        ///     COM interop.
+        /// </param>
+        /// <param name="hasMxAccessClientOverride">
+        ///     A value indicating whether the override client should be used instead of
+        ///     creating a client from <paramref name="mxProxy" />.
+        /// </param>
         internal OpcUaService(AppConfiguration config, IMxProxy? mxProxy, IGalaxyRepository? galaxyRepository,
             IMxAccessClient? mxAccessClientOverride = null, bool hasMxAccessClientOverride = false,
             IUserAuthenticationProvider? authProviderOverride = null, bool hasAuthProviderOverride = false)
@@ -88,8 +97,50 @@ namespace ZB.MOM.WW.LmxOpcUa.Host
             _hasAuthProviderOverride = hasAuthProviderOverride;
         }
 
+        // Accessors for testing
         /// <summary>
-        /// Starts the bridge by validating configuration, connecting runtime dependencies, building the Galaxy-backed OPC UA address space, and optionally hosting the status dashboard.
+        ///     Gets the MXAccess client instance currently wired into the service for test inspection.
+        /// </summary>
+        internal IMxAccessClient? MxClient => (IMxAccessClient?)_mxAccessClient ?? _mxAccessClientForWiring;
+
+        /// <summary>
+        ///     Gets the metrics collector that tracks bridge operation timings during the service lifetime.
+        /// </summary>
+        internal PerformanceMetrics? Metrics { get; private set; }
+
+        /// <summary>
+        ///     Gets the OPC UA server host that owns the runtime endpoint.
+        /// </summary>
+        internal OpcUaServerHost? ServerHost { get; private set; }
+
+        /// <summary>
+        ///     Gets the node manager instance that holds the current Galaxy-derived address space.
+        /// </summary>
+        internal LmxNodeManager? NodeManagerInstance { get; private set; }
+
+        /// <summary>
+        ///     Gets the change-detection service that watches for Galaxy deploys requiring a rebuild.
+        /// </summary>
+        internal ChangeDetectionService? ChangeDetectionInstance { get; private set; }
+
+        /// <summary>
+        ///     Gets the hosted status web server when the dashboard is enabled.
+        /// </summary>
+        internal StatusWebServer? StatusWeb { get; private set; }
+
+        /// <summary>
+        ///     Gets the dashboard report generator used to assemble operator-facing status snapshots.
+        /// </summary>
+        internal StatusReportService? StatusReportInstance { get; private set; }
+
+        /// <summary>
+        ///     Gets the Galaxy statistics snapshot populated during repository reads and rebuilds.
+        /// </summary>
+        internal GalaxyRepositoryStats? GalaxyStatsInstance { get; private set; }
+
+        /// <summary>
+        ///     Starts the bridge by validating configuration, connecting runtime dependencies, building the Galaxy-backed OPC UA
+        ///     address space, and optionally hosting the status dashboard.
         /// </summary>
         public void Start()
         {
@@ -109,7 +160,7 @@ namespace ZB.MOM.WW.LmxOpcUa.Host
 
                 // Step 4: Create PerformanceMetrics
                 _cts = new CancellationTokenSource();
-                _metrics = new PerformanceMetrics();
+                Metrics = new PerformanceMetrics();
 
                 // Step 5: Create MxAccessClient → Connect
                 if (_hasMxAccessClientOverride)
@@ -117,24 +168,23 @@ namespace ZB.MOM.WW.LmxOpcUa.Host
                     // Test path: use injected IMxAccessClient directly (skips STA thread + COM)
                     _mxAccessClientForWiring = _mxAccessClientOverride;
                     if (_mxAccessClientForWiring != null && _mxAccessClientForWiring.State != ConnectionState.Connected)
-                    {
                         _mxAccessClientForWiring.ConnectAsync(_cts.Token).GetAwaiter().GetResult();
                 }
-                }
                 else if (_mxProxy != null)
                 {
                     try
                     {
                         _staThread = new StaComThread();
                         _staThread.Start();
-                        _mxAccessClient = new MxAccessClient(_staThread, _mxProxy, _config.MxAccess, _metrics);
+                        _mxAccessClient = new MxAccessClient(_staThread, _mxProxy, _config.MxAccess, Metrics);
                         try
                         {
                             _mxAccessClient.ConnectAsync(_cts.Token).GetAwaiter().GetResult();
                         }
                         catch (Exception ex)
                         {
-                            Log.Warning(ex, "MxAccess connection failed at startup - monitor will continue retrying in the background");
+                            Log.Warning(ex,
+                                "MxAccess connection failed at startup - monitor will continue retrying in the background");
                         }
 
                         // Step 6: Start monitor loop even if initial connect failed
@@ -151,97 +201,101 @@ namespace ZB.MOM.WW.LmxOpcUa.Host
                 }
 
                 // Step 7: Create GalaxyRepositoryService → TestConnection
-                _galaxyStats = new GalaxyRepositoryStats { GalaxyName = _config.OpcUa.GalaxyName };
+                GalaxyStatsInstance = new GalaxyRepositoryStats { GalaxyName = _config.OpcUa.GalaxyName };
 
                 if (_galaxyRepository != null)
                 {
                     var dbOk = _galaxyRepository.TestConnectionAsync(_cts.Token).GetAwaiter().GetResult();
-                    _galaxyStats.DbConnected = dbOk;
+                    GalaxyStatsInstance.DbConnected = dbOk;
                     if (!dbOk)
                         Log.Warning("Galaxy repository database connection failed — continuing without initial data");
                 }
 
                 // Step 8: Create OPC UA server host + node manager
-                var effectiveMxClient = (IMxAccessClient?)_mxAccessClient ?? _mxAccessClientForWiring ?? new NullMxAccessClient();
+                var effectiveMxClient = (IMxAccessClient?)_mxAccessClient ??
+                                        _mxAccessClientForWiring ?? new NullMxAccessClient();
                 var historianDataSource = _config.Historian.Enabled
-                    ? new Historian.HistorianDataSource(_config.Historian)
+                    ? new HistorianDataSource(_config.Historian)
                     : null;
-                Domain.IUserAuthenticationProvider? authProvider = null;
+                IUserAuthenticationProvider? authProvider = null;
                 if (_hasAuthProviderOverride)
                 {
                     authProvider = _authProviderOverride;
                 }
                 else if (_config.Authentication.Ldap.Enabled)
                 {
-                    authProvider = new Domain.LdapAuthenticationProvider(_config.Authentication.Ldap);
+                    authProvider = new LdapAuthenticationProvider(_config.Authentication.Ldap);
                     Log.Information("LDAP authentication enabled (server={Host}:{Port}, baseDN={BaseDN})",
-                        _config.Authentication.Ldap.Host, _config.Authentication.Ldap.Port, _config.Authentication.Ldap.BaseDN);
+                        _config.Authentication.Ldap.Host, _config.Authentication.Ldap.Port,
+                        _config.Authentication.Ldap.BaseDN);
                 }
-                _serverHost = new OpcUaServerHost(_config.OpcUa, effectiveMxClient, _metrics, historianDataSource,
+
+                ServerHost = new OpcUaServerHost(_config.OpcUa, effectiveMxClient, Metrics, historianDataSource,
                     _config.Authentication, authProvider, _config.Security, _config.Redundancy);
 
                 // Step 9-10: Query hierarchy, start server, build address space
                 DateTime? initialDeployTime = null;
-                if (_galaxyRepository != null && _galaxyStats.DbConnected)
+                if (_galaxyRepository != null && GalaxyStatsInstance.DbConnected)
                 {
                     try
                     {
-                        initialDeployTime = _galaxyRepository.GetLastDeployTimeAsync(_cts.Token).GetAwaiter().GetResult();
+                        initialDeployTime = _galaxyRepository.GetLastDeployTimeAsync(_cts.Token).GetAwaiter()
+                            .GetResult();
                         var hierarchy = _galaxyRepository.GetHierarchyAsync(_cts.Token).GetAwaiter().GetResult();
                         var attributes = _galaxyRepository.GetAttributesAsync(_cts.Token).GetAwaiter().GetResult();
-                        _galaxyStats.ObjectCount = hierarchy.Count;
+                        GalaxyStatsInstance.ObjectCount = hierarchy.Count;
-                        _galaxyStats.AttributeCount = attributes.Count;
+                        GalaxyStatsInstance.AttributeCount = attributes.Count;
 
-                        _serverHost.StartAsync().GetAwaiter().GetResult();
+                        ServerHost.StartAsync().GetAwaiter().GetResult();
-                        _nodeManager = _serverHost.NodeManager;
+                        NodeManagerInstance = ServerHost.NodeManager;
 
-                        if (_nodeManager != null)
+                        if (NodeManagerInstance != null)
                         {
-                            _nodeManager.BuildAddressSpace(hierarchy, attributes);
+                            NodeManagerInstance.BuildAddressSpace(hierarchy, attributes);
-                            _galaxyStats.LastRebuildTime = DateTime.UtcNow;
+                            GalaxyStatsInstance.LastRebuildTime = DateTime.UtcNow;
                         }
                     }
                     catch (Exception ex)
                     {
                         Log.Warning(ex, "Failed to build initial address space");
-                        if (!_serverHost.IsRunning)
+                        if (!ServerHost.IsRunning)
                         {
-                            _serverHost.StartAsync().GetAwaiter().GetResult();
+                            ServerHost.StartAsync().GetAwaiter().GetResult();
-                            _nodeManager = _serverHost.NodeManager;
+                            NodeManagerInstance = ServerHost.NodeManager;
                         }
                     }
                 }
                 else
                 {
-                    _serverHost.StartAsync().GetAwaiter().GetResult();
+                    ServerHost.StartAsync().GetAwaiter().GetResult();
-                    _nodeManager = _serverHost.NodeManager;
+                    NodeManagerInstance = ServerHost.NodeManager;
                 }
 
                 // Step 11-12: Change detection wired to rebuild
                 if (_galaxyRepository != null)
                 {
-                    _changeDetection = new ChangeDetectionService(_galaxyRepository, _config.GalaxyRepository.ChangeDetectionIntervalSeconds, initialDeployTime);
+                    ChangeDetectionInstance = new ChangeDetectionService(_galaxyRepository,
-                    _changeDetection.OnGalaxyChanged += OnGalaxyChanged;
+                        _config.GalaxyRepository.ChangeDetectionIntervalSeconds, initialDeployTime);
-                    _changeDetection.Start();
+                    ChangeDetectionInstance.OnGalaxyChanged += OnGalaxyChanged;
+                    ChangeDetectionInstance.Start();
                 }
 
                 // Step 13: Dashboard
                 _healthCheck = new HealthCheckService();
-                _statusReport = new StatusReportService(_healthCheck, _config.Dashboard.RefreshIntervalSeconds);
+                StatusReportInstance = new StatusReportService(_healthCheck, _config.Dashboard.RefreshIntervalSeconds);
-                _statusReport.SetComponents(effectiveMxClient, _metrics, _galaxyStats, _serverHost, _nodeManager,
+                StatusReportInstance.SetComponents(effectiveMxClient, Metrics, GalaxyStatsInstance, ServerHost,
+                    NodeManagerInstance,
                     _config.Redundancy, _config.OpcUa.ApplicationUri);
 
                 if (_config.Dashboard.Enabled)
                 {
-                    _statusWebServer = new StatusWebServer(_statusReport, _config.Dashboard.Port);
+                    StatusWeb = new StatusWebServer(StatusReportInstance, _config.Dashboard.Port);
-                    _statusWebServer.Start();
+                    StatusWeb.Start();
                 }
 
                 // Wire ServiceLevel updates from MXAccess health changes
                 if (_config.Redundancy.Enabled)
-                {
                     effectiveMxClient.ConnectionStateChanged += OnMxAccessStateChangedForServiceLevel;
-                }
 
                 // Step 14
                 Log.Information("LmxOpcUa service started successfully");
@@ -254,7 +308,8 @@ namespace ZB.MOM.WW.LmxOpcUa.Host
         }
 
         /// <summary>
-        /// Stops the bridge, cancels monitoring loops, disconnects runtime integrations, and releases hosted resources in shutdown order.
+        ///     Stops the bridge, cancels monitoring loops, disconnects runtime integrations, and releases hosted resources in
+        ///     shutdown order.
         /// </summary>
         public void Stop()
         {
@@ -263,8 +318,8 @@ namespace ZB.MOM.WW.LmxOpcUa.Host
             try
             {
                 _cts?.Cancel();
-                _changeDetection?.Stop();
+                ChangeDetectionInstance?.Stop();
-                _serverHost?.Stop();
+                ServerHost?.Stop();
 
                 if (_mxAccessClient != null)
                 {
@@ -272,11 +327,12 @@ namespace ZB.MOM.WW.LmxOpcUa.Host
                     _mxAccessClient.DisconnectAsync().GetAwaiter().GetResult();
                     _mxAccessClient.Dispose();
                 }
+
                 _staThread?.Dispose();
 
-                _statusWebServer?.Dispose();
+                StatusWeb?.Dispose();
-                _metrics?.Dispose();
+                Metrics?.Dispose();
-                _changeDetection?.Dispose();
+                ChangeDetectionInstance?.Dispose();
                 _cts?.Dispose();
 
                 AppDomain.CurrentDomain.UnhandledException -= OnUnhandledException;
@@ -294,19 +350,19 @@ namespace ZB.MOM.WW.LmxOpcUa.Host
             Log.Information("Galaxy change detected — rebuilding address space");
             try
             {
-                if (_galaxyRepository == null || _nodeManager == null) return;
+                if (_galaxyRepository == null || NodeManagerInstance == null) return;
 
                 var hierarchy = _galaxyRepository.GetHierarchyAsync().GetAwaiter().GetResult();
                 var attributes = _galaxyRepository.GetAttributesAsync().GetAwaiter().GetResult();
 
-                _nodeManager.RebuildAddressSpace(hierarchy, attributes);
+                NodeManagerInstance.RebuildAddressSpace(hierarchy, attributes);
 
-                if (_galaxyStats != null)
+                if (GalaxyStatsInstance != null)
                 {
-                    _galaxyStats.ObjectCount = hierarchy.Count;
+                    GalaxyStatsInstance.ObjectCount = hierarchy.Count;
-                    _galaxyStats.AttributeCount = attributes.Count;
+                    GalaxyStatsInstance.AttributeCount = attributes.Count;
-                    _galaxyStats.LastRebuildTime = DateTime.UtcNow;
+                    GalaxyStatsInstance.LastRebuildTime = DateTime.UtcNow;
-                    _galaxyStats.LastDeployTime = _changeDetection?.LastKnownDeployTime;
+                    GalaxyStatsInstance.LastDeployTime = ChangeDetectionInstance?.LastKnownDeployTime;
                 }
             }
             catch (Exception ex)
@@ -315,64 +371,27 @@ namespace ZB.MOM.WW.LmxOpcUa.Host
             }
         }
 
-        private void OnMxAccessStateChangedForServiceLevel(object? sender, Domain.ConnectionStateChangedEventArgs e)
+        private void OnMxAccessStateChangedForServiceLevel(object? sender, ConnectionStateChangedEventArgs e)
         {
-            var mxConnected = e.CurrentState == Domain.ConnectionState.Connected;
+            var mxConnected = e.CurrentState == ConnectionState.Connected;
-            var dbConnected = _galaxyStats?.DbConnected ?? false;
+            var dbConnected = GalaxyStatsInstance?.DbConnected ?? false;
-            _serverHost?.UpdateServiceLevel(mxConnected, dbConnected);
+            ServerHost?.UpdateServiceLevel(mxConnected, dbConnected);
             Log.Debug("ServiceLevel updated: MxAccess={MxState}, DB={DbState}", e.CurrentState, dbConnected);
         }
 
         private static void OnUnhandledException(object sender, UnhandledExceptionEventArgs e)
         {
-            Log.Fatal(e.ExceptionObject as Exception, "Unhandled exception (IsTerminating={IsTerminating})", e.IsTerminating);
+            Log.Fatal(e.ExceptionObject as Exception, "Unhandled exception (IsTerminating={IsTerminating})",
+                e.IsTerminating);
         }
 
         /// <summary>
         ///     Triggers an address space rebuild from the current Galaxy repository data. For testing.
         /// </summary>
-        internal void TriggerRebuild() => OnGalaxyChanged();
+        internal void TriggerRebuild()
-
+        {
-        // Accessors for testing
+            OnGalaxyChanged();
-        /// <summary>
+        }
-        /// Gets the MXAccess client instance currently wired into the service for test inspection.
-        /// </summary>
-        internal IMxAccessClient? MxClient => (IMxAccessClient?)_mxAccessClient ?? _mxAccessClientForWiring;
-
-        /// <summary>
-        /// Gets the metrics collector that tracks bridge operation timings during the service lifetime.
-        /// </summary>
-        internal PerformanceMetrics? Metrics => _metrics;
-
-        /// <summary>
-        /// Gets the OPC UA server host that owns the runtime endpoint.
-        /// </summary>
-        internal OpcUaServerHost? ServerHost => _serverHost;
-
-        /// <summary>
-        /// Gets the node manager instance that holds the current Galaxy-derived address space.
-        /// </summary>
-        internal LmxNodeManager? NodeManagerInstance => _nodeManager;
-
-        /// <summary>
-        /// Gets the change-detection service that watches for Galaxy deploys requiring a rebuild.
-        /// </summary>
-        internal ChangeDetectionService? ChangeDetectionInstance => _changeDetection;
-
-        /// <summary>
-        /// Gets the hosted status web server when the dashboard is enabled.
-        /// </summary>
-        internal StatusWebServer? StatusWeb => _statusWebServer;
-
-        /// <summary>
-        /// Gets the dashboard report generator used to assemble operator-facing status snapshots.
-        /// </summary>
-        internal StatusReportService? StatusReportInstance => _statusReport;
-
-        /// <summary>
-        /// Gets the Galaxy statistics snapshot populated during repository reads and rebuilds.
-        /// </summary>
-        internal GalaxyRepositoryStats? GalaxyStatsInstance => _galaxyStats;
     }
 
     /// <summary>
@@ -409,25 +428,37 @@ namespace ZB.MOM.WW.LmxOpcUa.Host
         ///     Completes immediately because no live runtime connection is available or required.
         /// </summary>
         /// <param name="ct">A cancellation token that is ignored by the null implementation.</param>
-        public System.Threading.Tasks.Task ConnectAsync(CancellationToken ct = default) => System.Threading.Tasks.Task.CompletedTask;
+        public Task ConnectAsync(CancellationToken ct = default)
+        {
+            return Task.CompletedTask;
+        }
 
         /// <summary>
         ///     Completes immediately because there is no live runtime session to close.
         /// </summary>
-        public System.Threading.Tasks.Task DisconnectAsync() => System.Threading.Tasks.Task.CompletedTask;
+        public Task DisconnectAsync()
+        {
+            return Task.CompletedTask;
+        }
 
         /// <summary>
         ///     Completes immediately because the null client does not subscribe to live Galaxy attributes.
         /// </summary>
         /// <param name="fullTagReference">The tag reference that would have been subscribed.</param>
         /// <param name="callback">The callback that would have received runtime value changes.</param>
-        public System.Threading.Tasks.Task SubscribeAsync(string fullTagReference, Action<string, Vtq> callback) => System.Threading.Tasks.Task.CompletedTask;
+        public Task SubscribeAsync(string fullTagReference, Action<string, Vtq> callback)
+        {
+            return Task.CompletedTask;
+        }
 
         /// <summary>
         ///     Completes immediately because the null client does not maintain runtime subscriptions.
         /// </summary>
         /// <param name="fullTagReference">The tag reference that would have been unsubscribed.</param>
-        public System.Threading.Tasks.Task UnsubscribeAsync(string fullTagReference) => System.Threading.Tasks.Task.CompletedTask;
+        public Task UnsubscribeAsync(string fullTagReference)
+        {
+            return Task.CompletedTask;
+        }
 
         /// <summary>
         ///     Returns a bad-quality value because no live runtime source exists.
@@ -435,7 +466,10 @@ namespace ZB.MOM.WW.LmxOpcUa.Host
         /// <param name="fullTagReference">The tag reference that would have been read from the runtime.</param>
         /// <param name="ct">A cancellation token that is ignored by the null implementation.</param>
         /// <returns>A bad-quality VTQ indicating that runtime data is unavailable.</returns>
-        public System.Threading.Tasks.Task<Vtq> ReadAsync(string fullTagReference, CancellationToken ct = default) => System.Threading.Tasks.Task.FromResult(Vtq.Bad());
+        public Task<Vtq> ReadAsync(string fullTagReference, CancellationToken ct = default)
+        {
+            return Task.FromResult(Vtq.Bad());
+        }
 
         /// <summary>
         ///     Rejects writes because there is no live runtime endpoint behind the null client.
@@ -443,12 +477,17 @@ namespace ZB.MOM.WW.LmxOpcUa.Host
         /// <param name="fullTagReference">The tag reference that would have been written.</param>
         /// <param name="value">The value that would have been sent to the runtime.</param>
         /// <param name="ct">A cancellation token that is ignored by the null implementation.</param>
-        /// <returns>A completed task returning <see langword="false"/>.</returns>
+        /// <returns>A completed task returning <see langword="false" />.</returns>
-        public System.Threading.Tasks.Task<bool> WriteAsync(string fullTagReference, object value, CancellationToken ct = default) => System.Threading.Tasks.Task.FromResult(false);
+        public Task<bool> WriteAsync(string fullTagReference, object value, CancellationToken ct = default)
+        {
+            return Task.FromResult(false);
+        }
 
         /// <summary>
         ///     Releases the null client. No unmanaged runtime resources exist.
         /// </summary>
-        public void Dispose() { }
+        public void Dispose()
+        {
+        }
     }
 }

src/ZB.MOM.WW.LmxOpcUa.Host/OpcUaServiceBuilder.cs

@@ -1,4 +1,7 @@
+using System;
 using System.Collections.Generic;
+using System.Threading;
+using System.Threading.Tasks;
 using ZB.MOM.WW.LmxOpcUa.Host.Configuration;
 using ZB.MOM.WW.LmxOpcUa.Host.Domain;
 
@@ -10,15 +13,15 @@ namespace ZB.MOM.WW.LmxOpcUa.Host
     /// </summary>
     internal class OpcUaServiceBuilder
     {
-        private AppConfiguration _config = new AppConfiguration();
-        private IMxProxy? _mxProxy;
-        private IGalaxyRepository? _galaxyRepository;
-        private IMxAccessClient? _mxAccessClient;
-        private bool _mxProxySet;
-        private bool _galaxyRepositorySet;
-        private bool _mxAccessClientSet;
         private IUserAuthenticationProvider? _authProvider;
         private bool _authProviderSet;
+        private AppConfiguration _config = new();
+        private IGalaxyRepository? _galaxyRepository;
+        private bool _galaxyRepositorySet;
+        private IMxAccessClient? _mxAccessClient;
+        private bool _mxAccessClientSet;
+        private IMxProxy? _mxProxy;
+        private bool _mxProxySet;
 
         /// <summary>
         ///     Replaces the default service configuration used by the test host.
@@ -187,7 +190,7 @@ namespace ZB.MOM.WW.LmxOpcUa.Host
         }
 
         /// <summary>
-        /// Creates an <see cref="OpcUaService"/> using the accumulated test doubles and configuration overrides.
+        ///     Creates an <see cref="OpcUaService" /> using the accumulated test doubles and configuration overrides.
         /// </summary>
         /// <returns>A service instance ready for integration-style testing.</returns>
         public OpcUaService Build()
@@ -207,11 +210,6 @@ namespace ZB.MOM.WW.LmxOpcUa.Host
         /// </summary>
         private class FakeBuilderGalaxyRepository : IGalaxyRepository
         {
-            /// <summary>
-            /// Occurs when the fake repository wants to simulate a Galaxy deploy change.
-            /// </summary>
-            public event System.Action? OnGalaxyChanged;
-
             /// <summary>
             ///     Gets or sets the hierarchy rows that the fake repository returns to the service.
             /// </summary>
@@ -222,37 +220,50 @@ namespace ZB.MOM.WW.LmxOpcUa.Host
             /// </summary>
             public List<GalaxyAttributeInfo> Attributes { get; set; } = new();
 
+            /// <summary>
+            ///     Occurs when the fake repository wants to simulate a Galaxy deploy change.
+            /// </summary>
+            public event Action? OnGalaxyChanged;
+
             /// <summary>
             ///     Returns the seeded hierarchy rows for address-space construction.
             /// </summary>
             /// <param name="ct">A cancellation token that is ignored by the in-memory fake.</param>
             /// <returns>The configured hierarchy rows.</returns>
-            public System.Threading.Tasks.Task<List<GalaxyObjectInfo>> GetHierarchyAsync(System.Threading.CancellationToken ct = default)
+            public Task<List<GalaxyObjectInfo>> GetHierarchyAsync(CancellationToken ct = default)
-                => System.Threading.Tasks.Task.FromResult(Hierarchy);
+            {
+                return Task.FromResult(Hierarchy);
+            }
 
             /// <summary>
             ///     Returns the seeded attribute rows for address-space construction.
             /// </summary>
             /// <param name="ct">A cancellation token that is ignored by the in-memory fake.</param>
             /// <returns>The configured attribute rows.</returns>
-            public System.Threading.Tasks.Task<List<GalaxyAttributeInfo>> GetAttributesAsync(System.Threading.CancellationToken ct = default)
+            public Task<List<GalaxyAttributeInfo>> GetAttributesAsync(CancellationToken ct = default)
-                => System.Threading.Tasks.Task.FromResult(Attributes);
+            {
+                return Task.FromResult(Attributes);
+            }
 
             /// <summary>
             ///     Returns the current UTC time so change-detection tests have a deploy timestamp to compare against.
             /// </summary>
             /// <param name="ct">A cancellation token that is ignored by the in-memory fake.</param>
             /// <returns>The current UTC time.</returns>
-            public System.Threading.Tasks.Task<System.DateTime?> GetLastDeployTimeAsync(System.Threading.CancellationToken ct = default)
+            public Task<DateTime?> GetLastDeployTimeAsync(CancellationToken ct = default)
-                => System.Threading.Tasks.Task.FromResult<System.DateTime?>(System.DateTime.UtcNow);
+            {
+                return Task.FromResult<DateTime?>(DateTime.UtcNow);
+            }
 
             /// <summary>
             ///     Reports a healthy repository connection for builder-based test setups.
             /// </summary>
             /// <param name="ct">A cancellation token that is ignored by the in-memory fake.</param>
-            /// <returns>A completed task returning <see langword="true"/>.</returns>
+            /// <returns>A completed task returning <see langword="true" />.</returns>
-            public System.Threading.Tasks.Task<bool> TestConnectionAsync(System.Threading.CancellationToken ct = default)
+            public Task<bool> TestConnectionAsync(CancellationToken ct = default)
-                => System.Threading.Tasks.Task.FromResult(true);
+            {
+                return Task.FromResult(true);
+            }
         }
     }
 }

src/ZB.MOM.WW.LmxOpcUa.Host/Program.cs

@@ -6,7 +6,7 @@ namespace ZB.MOM.WW.LmxOpcUa.Host
 {
     internal static class Program
     {
-        static int Main(string[] args)
+        private static int Main(string[] args)
         {
             // Set working directory to exe location so relative log paths resolve correctly
             // (Windows services default to System32)
@@ -16,7 +16,7 @@ namespace ZB.MOM.WW.LmxOpcUa.Host
                 .MinimumLevel.Information()
                 .WriteTo.Console()
                 .WriteTo.File(
-                    path: "logs/lmxopcua-.log",
+                    "logs/lmxopcua-.log",
                     rollingInterval: RollingInterval.Day,
                     retainedFileCountLimit: 31)
                 .CreateLogger();

src/ZB.MOM.WW.LmxOpcUa.Host/Status/HealthCheckService.cs

@@ -18,32 +18,27 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.Status
         {
             // Rule 1: Not connected → Unhealthy
             if (connectionState != ConnectionState.Connected)
-            {
                 return new HealthInfo
                 {
                     Status = "Unhealthy",
                     Message = $"MXAccess not connected (state: {connectionState})",
                     Color = "red"
                 };
-            }
 
             // Rule 2: Success rate < 50% with > 100 ops → Degraded
             if (metrics != null)
             {
                 var stats = metrics.GetStatistics();
                 foreach (var kvp in stats)
-                {
                     if (kvp.Value.TotalCount > 100 && kvp.Value.SuccessRate < 0.5)
-                    {
                         return new HealthInfo
                         {
                             Status = "Degraded",
-                            Message = $"{kvp.Key} success rate is {kvp.Value.SuccessRate:P0} ({kvp.Value.TotalCount} ops)",
+                            Message =
+                                $"{kvp.Key} success rate is {kvp.Value.SuccessRate:P0} ({kvp.Value.TotalCount} ops)",
                             Color = "yellow"
                         };
             }
-                }
-            }
 
             // Rule 3: All good
             return new HealthInfo
@@ -59,7 +54,7 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.Status
         /// </summary>
         /// <param name="connectionState">The current MXAccess connection state.</param>
         /// <param name="metrics">The recorded performance metrics, if available.</param>
-        /// <returns><see langword="true"/> when the bridge is not unhealthy; otherwise, <see langword="false"/>.</returns>
+        /// <returns><see langword="true" /> when the bridge is not unhealthy; otherwise, <see langword="false" />.</returns>
         public bool IsHealthy(ConnectionState connectionState, PerformanceMetrics? metrics)
         {
             var health = CheckHealth(connectionState, metrics);

src/ZB.MOM.WW.LmxOpcUa.Host/Status/StatusReportService.cs

@@ -1,4 +1,5 @@
 using System;
+using System.Collections.Generic;
 using System.Text;
 using System.Text.Json;
 using ZB.MOM.WW.LmxOpcUa.Host.Configuration;
@@ -17,17 +18,18 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.Status
         private readonly HealthCheckService _healthCheck;
         private readonly int _refreshIntervalSeconds;
         private readonly DateTime _startTime = DateTime.UtcNow;
+        private string? _applicationUri;
+        private GalaxyRepositoryStats? _galaxyStats;
+        private PerformanceMetrics? _metrics;
 
         private IMxAccessClient? _mxAccessClient;
-        private PerformanceMetrics? _metrics;
-        private GalaxyRepositoryStats? _galaxyStats;
-        private OpcUaServerHost? _serverHost;
         private LmxNodeManager? _nodeManager;
         private RedundancyConfiguration? _redundancyConfig;
-        private string? _applicationUri;
+        private OpcUaServerHost? _serverHost;
 
         /// <summary>
-        /// Initializes a new status report service for the dashboard using the supplied health-check policy and refresh interval.
+        ///     Initializes a new status report service for the dashboard using the supplied health-check policy and refresh
+        ///     interval.
         /// </summary>
         /// <param name="healthCheck">The health-check component used to derive the overall dashboard health status.</param>
         /// <param name="refreshIntervalSeconds">The HTML auto-refresh interval, in seconds, for the dashboard page.</param>
@@ -44,7 +46,10 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.Status
         /// <param name="metrics">The performance metrics collector whose operation statistics should be reported.</param>
         /// <param name="galaxyStats">The Galaxy repository statistics to surface on the dashboard.</param>
         /// <param name="serverHost">The OPC UA server host whose active session count should be reported.</param>
-        /// <param name="nodeManager">The node manager whose queue depth and MXAccess event throughput should be surfaced on the dashboard.</param>
+        /// <param name="nodeManager">
+        ///     The node manager whose queue depth and MXAccess event throughput should be surfaced on the
+        ///     dashboard.
+        /// </param>
         public void SetComponents(IMxAccessClient? mxAccessClient, PerformanceMetrics? metrics,
             GalaxyRepositoryStats? galaxyStats, OpcUaServerHost? serverHost,
             LmxNodeManager? nodeManager = null,
@@ -96,7 +101,7 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.Status
                     PendingItems = _nodeManager?.PendingDataChangeCount ?? 0,
                     TotalEvents = _nodeManager?.TotalMxChangeEvents ?? 0
                 },
-                Operations = _metrics?.GetStatistics() ?? new(),
+                Operations = _metrics?.GetStatistics() ?? new Dictionary<string, MetricsStatistics>(),
                 Redundancy = BuildRedundancyInfo(),
                 Footer = new FooterInfo
                 {
@@ -126,7 +131,7 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.Status
                 Role = _redundancyConfig.Role,
                 ServiceLevel = calculator.Calculate(baseLevel, mxConnected, dbConnected),
                 ApplicationUri = _applicationUri ?? "",
-                ServerUris = new System.Collections.Generic.List<string>(_redundancyConfig.ServerUris)
+                ServerUris = new List<string>(_redundancyConfig.ServerUris)
             };
         }
 
@@ -146,16 +151,20 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.Status
             sb.AppendLine("<style>");
             sb.AppendLine("body { font-family: monospace; background: #1a1a2e; color: #eee; padding: 20px; }");
             sb.AppendLine(".panel { border: 2px solid #444; border-radius: 8px; padding: 15px; margin: 10px 0; }");
-            sb.AppendLine(".green { border-color: #00cc66; } .red { border-color: #cc3333; } .yellow { border-color: #cccc33; } .gray { border-color: #666; }");
+            sb.AppendLine(
-            sb.AppendLine("table { width: 100%; border-collapse: collapse; } th, td { text-align: left; padding: 4px 8px; border-bottom: 1px solid #333; }");
+                ".green { border-color: #00cc66; } .red { border-color: #cc3333; } .yellow { border-color: #cccc33; } .gray { border-color: #666; }");
+            sb.AppendLine(
+                "table { width: 100%; border-collapse: collapse; } th, td { text-align: left; padding: 4px 8px; border-bottom: 1px solid #333; }");
             sb.AppendLine("h2 { margin: 0 0 10px 0; } h1 { color: #66ccff; }");
             sb.AppendLine("</style></head><body>");
             sb.AppendLine("<h1>LmxOpcUa Status Dashboard</h1>");
 
             // Connection panel
-            var connColor = data.Connection.State == "Connected" ? "green" : data.Connection.State == "Connecting" ? "yellow" : "red";
+            var connColor = data.Connection.State == "Connected" ? "green" :
+                data.Connection.State == "Connecting" ? "yellow" : "red";
             sb.AppendLine($"<div class='panel {connColor}'><h2>Connection</h2>");
-            sb.AppendLine($"<p>State: <b>{data.Connection.State}</b> | Reconnects: {data.Connection.ReconnectCount} | Sessions: {data.Connection.ActiveSessions}</p>");
+            sb.AppendLine(
+                $"<p>State: <b>{data.Connection.State}</b> | Reconnects: {data.Connection.ReconnectCount} | Sessions: {data.Connection.ActiveSessions}</p>");
             sb.AppendLine("</div>");
 
             // Health panel
@@ -168,7 +177,8 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.Status
             {
                 var roleColor = data.Redundancy.Role == "Primary" ? "green" : "yellow";
                 sb.AppendLine($"<div class='panel {roleColor}'><h2>Redundancy</h2>");
-                sb.AppendLine($"<p>Mode: <b>{data.Redundancy.Mode}</b> | Role: <b>{data.Redundancy.Role}</b> | Service Level: <b>{data.Redundancy.ServiceLevel}</b></p>");
+                sb.AppendLine(
+                    $"<p>Mode: <b>{data.Redundancy.Mode}</b> | Role: <b>{data.Redundancy.Role}</b> | Service Level: <b>{data.Redundancy.ServiceLevel}</b></p>");
                 sb.AppendLine($"<p>Application URI: {data.Redundancy.ApplicationUri}</p>");
                 sb.AppendLine($"<p>Redundant Set: {string.Join(", ", data.Redundancy.ServerUris)}</p>");
                 sb.AppendLine("</div>");
@@ -181,25 +191,30 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.Status
 
             // Data Change Dispatch panel
             sb.AppendLine("<div class='panel gray'><h2>Data Change Dispatch</h2>");
-            sb.AppendLine($"<p>Events/sec: <b>{data.DataChange.EventsPerSecond:F1}</b> | Avg Batch Size: <b>{data.DataChange.AvgBatchSize:F1}</b> | Pending: {data.DataChange.PendingItems} | Total Events: {data.DataChange.TotalEvents:N0}</p>");
+            sb.AppendLine(
+                $"<p>Events/sec: <b>{data.DataChange.EventsPerSecond:F1}</b> | Avg Batch Size: <b>{data.DataChange.AvgBatchSize:F1}</b> | Pending: {data.DataChange.PendingItems} | Total Events: {data.DataChange.TotalEvents:N0}</p>");
             sb.AppendLine("</div>");
 
             // Galaxy Info panel
             sb.AppendLine("<div class='panel gray'><h2>Galaxy Info</h2>");
-            sb.AppendLine($"<p>Galaxy: <b>{data.Galaxy.GalaxyName}</b> | DB: {(data.Galaxy.DbConnected ? "Connected" : "Disconnected")}</p>");
+            sb.AppendLine(
-            sb.AppendLine($"<p>Last Deploy: {data.Galaxy.LastDeployTime:O} | Objects: {data.Galaxy.ObjectCount} | Attributes: {data.Galaxy.AttributeCount}</p>");
+                $"<p>Galaxy: <b>{data.Galaxy.GalaxyName}</b> | DB: {(data.Galaxy.DbConnected ? "Connected" : "Disconnected")}</p>");
+            sb.AppendLine(
+                $"<p>Last Deploy: {data.Galaxy.LastDeployTime:O} | Objects: {data.Galaxy.ObjectCount} | Attributes: {data.Galaxy.AttributeCount}</p>");
             sb.AppendLine($"<p>Last Rebuild: {data.Galaxy.LastRebuildTime:O}</p>");
             sb.AppendLine("</div>");
 
             // Operations table
             sb.AppendLine("<div class='panel gray'><h2>Operations</h2>");
-            sb.AppendLine("<table><tr><th>Operation</th><th>Count</th><th>Success Rate</th><th>Avg (ms)</th><th>Min (ms)</th><th>Max (ms)</th><th>P95 (ms)</th></tr>");
+            sb.AppendLine(
+                "<table><tr><th>Operation</th><th>Count</th><th>Success Rate</th><th>Avg (ms)</th><th>Min (ms)</th><th>Max (ms)</th><th>P95 (ms)</th></tr>");
             foreach (var kvp in data.Operations)
             {
                 var s = kvp.Value;
                 sb.AppendLine($"<tr><td>{kvp.Key}</td><td>{s.TotalCount}</td><td>{s.SuccessRate:P1}</td>" +
                               $"<td>{s.AverageMilliseconds:F1}</td><td>{s.MinMilliseconds:F1}</td><td>{s.MaxMilliseconds:F1}</td><td>{s.Percentile95Milliseconds:F1}</td></tr>");
             }
+
             sb.AppendLine("</table></div>");
 
             // Footer
@@ -224,7 +239,7 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.Status
         /// <summary>
         ///     Determines whether the bridge should currently be considered healthy for the dashboard health endpoint.
         /// </summary>
-        /// <returns><see langword="true"/> when the bridge meets the health policy; otherwise, <see langword="false"/>.</returns>
+        /// <returns><see langword="true" /> when the bridge meets the health policy; otherwise, <see langword="false" />.</returns>
         public bool IsHealthy()
         {
             var state = _mxAccessClient?.State ?? ConnectionState.Disconnected;
@@ -250,7 +265,7 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.Status
                 {
                     MxAccess = connectionState.ToString(),
                     Database = dbConnected ? "Connected" : "Disconnected",
-                    OpcUaServer = (_serverHost?.IsRunning ?? false) ? "Running" : "Stopped"
+                    OpcUaServer = _serverHost?.IsRunning ?? false ? "Running" : "Stopped"
                 },
                 Uptime = FormatUptime(uptime),
                 Timestamp = DateTime.UtcNow
@@ -304,13 +319,17 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.Status
             sb.AppendLine($"<meta http-equiv='refresh' content='{_refreshIntervalSeconds}'>");
             sb.AppendLine("<title>LmxOpcUa Health</title>");
             sb.AppendLine("<style>");
-            sb.AppendLine("body { font-family: monospace; background: #1a1a2e; color: #eee; padding: 20px; margin: 0; }");
+            sb.AppendLine(
+                "body { font-family: monospace; background: #1a1a2e; color: #eee; padding: 20px; margin: 0; }");
             sb.AppendLine(".header { text-align: center; padding: 30px 0; }");
-            sb.AppendLine(".status-badge { display: inline-block; font-size: 2em; font-weight: bold; padding: 15px 40px; border-radius: 12px; letter-spacing: 2px; }");
+            sb.AppendLine(
+                ".status-badge { display: inline-block; font-size: 2em; font-weight: bold; padding: 15px 40px; border-radius: 12px; letter-spacing: 2px; }");
             sb.AppendLine(".service-level { text-align: center; font-size: 4em; font-weight: bold; margin: 20px 0; }");
             sb.AppendLine(".service-level .label { font-size: 0.3em; color: #999; display: block; }");
-            sb.AppendLine(".components { display: flex; justify-content: center; gap: 20px; flex-wrap: wrap; margin: 30px auto; max-width: 800px; }");
+            sb.AppendLine(
-            sb.AppendLine(".component { border: 2px solid #444; border-radius: 8px; padding: 20px; min-width: 200px; text-align: center; }");
+                ".components { display: flex; justify-content: center; gap: 20px; flex-wrap: wrap; margin: 30px auto; max-width: 800px; }");
+            sb.AppendLine(
+                ".component { border: 2px solid #444; border-radius: 8px; padding: 20px; min-width: 200px; text-align: center; }");
             sb.AppendLine(".component .name { font-size: 0.9em; color: #999; margin-bottom: 8px; }");
             sb.AppendLine(".component .value { font-size: 1.3em; font-weight: bold; }");
             sb.AppendLine(".meta { text-align: center; margin-top: 30px; color: #666; font-size: 0.85em; }");
@@ -320,7 +339,8 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.Status
 
             // Status badge
             sb.AppendLine("<div class='header'>");
-            sb.AppendLine($"<div class='status-badge' style='background: {statusColor}; color: #000;'>{data.Status.ToUpperInvariant()}</div>");
+            sb.AppendLine(
+                $"<div class='status-badge' style='background: {statusColor}; color: #000;'>{data.Status.ToUpperInvariant()}</div>");
             sb.AppendLine("</div>");
 
             // Service Level
@@ -331,15 +351,17 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.Status
 
             // Redundancy info
             if (data.RedundancyEnabled)
-            {
+                sb.AppendLine(
-                sb.AppendLine($"<div class='redundancy'>Role: <b>{data.RedundancyRole}</b> | Mode: <b>{data.RedundancyMode}</b></div>");
+                    $"<div class='redundancy'>Role: <b>{data.RedundancyRole}</b> | Mode: <b>{data.RedundancyMode}</b></div>");
-            }
 
             // Component health cards
             sb.AppendLine("<div class='components'>");
-            sb.AppendLine($"<div class='component' style='border-color: {mxColor};'><div class='name'>MXAccess</div><div class='value' style='color: {mxColor};'>{data.Components.MxAccess}</div></div>");
+            sb.AppendLine(
-            sb.AppendLine($"<div class='component' style='border-color: {dbColor};'><div class='name'>Galaxy Database</div><div class='value' style='color: {dbColor};'>{data.Components.Database}</div></div>");
+                $"<div class='component' style='border-color: {mxColor};'><div class='name'>MXAccess</div><div class='value' style='color: {mxColor};'>{data.Components.MxAccess}</div></div>");
-            sb.AppendLine($"<div class='component' style='border-color: {uaColor};'><div class='name'>OPC UA Server</div><div class='value' style='color: {uaColor};'>{data.Components.OpcUaServer}</div></div>");
+            sb.AppendLine(
+                $"<div class='component' style='border-color: {dbColor};'><div class='name'>Galaxy Database</div><div class='value' style='color: {dbColor};'>{data.Components.Database}</div></div>");
+            sb.AppendLine(
+                $"<div class='component' style='border-color: {uaColor};'><div class='name'>OPC UA Server</div><div class='value' style='color: {uaColor};'>{data.Components.OpcUaServer}</div></div>");
             sb.AppendLine("</div>");
 
             // Footer

src/ZB.MOM.WW.LmxOpcUa.Host/Status/StatusWebServer.cs

@@ -13,16 +13,11 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.Status
     public class StatusWebServer : IDisposable
     {
         private static readonly ILogger Log = Serilog.Log.ForContext<StatusWebServer>();
+        private readonly int _port;
 
         private readonly StatusReportService _reportService;
-        private readonly int _port;
-        private HttpListener? _listener;
         private CancellationTokenSource? _cts;
-
+        private HttpListener? _listener;
-        /// <summary>
-        /// Gets a value indicating whether the dashboard listener is currently accepting requests.
-        /// </summary>
-        public bool IsRunning => _listener?.IsListening ?? false;
 
         /// <summary>
         ///     Initializes a new dashboard web server bound to the supplied report service and HTTP port.
@@ -35,6 +30,19 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.Status
             _port = port;
         }
 
+        /// <summary>
+        ///     Gets a value indicating whether the dashboard listener is currently accepting requests.
+        /// </summary>
+        public bool IsRunning => _listener?.IsListening ?? false;
+
+        /// <summary>
+        ///     Stops the dashboard listener and releases its resources.
+        /// </summary>
+        public void Dispose()
+        {
+            Stop();
+        }
+
         /// <summary>
         ///     Starts the HTTP listener and background request loop for the status dashboard.
         /// </summary>
@@ -69,7 +77,11 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.Status
                 _listener?.Stop();
                 _listener?.Close();
             }
-            catch { /* ignore */ }
+            catch
+            {
+                /* ignore */
+            }
+
             _listener = null;
             Log.Information("Status dashboard stopped");
         }
@@ -77,20 +89,24 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.Status
         private async Task ListenLoopAsync(CancellationToken ct)
         {
             while (!ct.IsCancellationRequested && _listener != null && _listener.IsListening)
-            {
                 try
                 {
                     var context = await _listener.GetContextAsync();
                     _ = HandleRequestAsync(context);
                 }
-                catch (ObjectDisposedException) { break; }
+                catch (ObjectDisposedException)
-                catch (HttpListenerException) { break; }
+                {
+                    break;
+                }
+                catch (HttpListenerException)
+                {
+                    break;
+                }
                 catch (Exception ex)
                 {
                     Log.Warning(ex, "Dashboard listener error");
                 }
         }
-        }
 
         private async Task HandleRequestAsync(HttpListenerContext context)
         {
@@ -144,11 +160,18 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.Status
             catch (Exception ex)
             {
                 Log.Warning(ex, "Error handling dashboard request");
-                try { context.Response.Close(); } catch { }
+                try
+                {
+                    context.Response.Close();
+                }
+                catch
+                {
+                }
             }
         }
 
-        private static async Task WriteResponse(HttpListenerResponse response, string body, string contentType, int statusCode)
+        private static async Task WriteResponse(HttpListenerResponse response, string body, string contentType,
+            int statusCode)
         {
             var buffer = Encoding.UTF8.GetBytes(body);
             response.StatusCode = statusCode;
@@ -157,10 +180,5 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.Status
             await response.OutputStream.WriteAsync(buffer, 0, buffer.Length);
             response.Close();
         }
-
-        /// <summary>
-        /// Stops the dashboard listener and releases its resources.
-        /// </summary>
-        public void Dispose() => Stop();
     }
 }

src/ZB.MOM.WW.LmxOpcUa.Host/ZB.MOM.WW.LmxOpcUa.Host.csproj

@@ -11,32 +11,32 @@
     </PropertyGroup>
 
     <ItemGroup>
-    <InternalsVisibleTo Include="ZB.MOM.WW.LmxOpcUa.Tests" />
+        <InternalsVisibleTo Include="ZB.MOM.WW.LmxOpcUa.Tests"/>
     </ItemGroup>
 
     <ItemGroup>
         <!-- Service hosting -->
-    <PackageReference Include="Topshelf" Version="4.3.0" />
+        <PackageReference Include="Topshelf" Version="4.3.0"/>
-    <PackageReference Include="Topshelf.Serilog" Version="4.3.0" />
+        <PackageReference Include="Topshelf.Serilog" Version="4.3.0"/>
 
         <!-- Logging -->
-    <PackageReference Include="Serilog" Version="2.10.0" />
+        <PackageReference Include="Serilog" Version="2.10.0"/>
-    <PackageReference Include="Serilog.Sinks.Console" Version="4.1.0" />
+        <PackageReference Include="Serilog.Sinks.Console" Version="4.1.0"/>
-    <PackageReference Include="Serilog.Sinks.File" Version="5.0.0" />
+        <PackageReference Include="Serilog.Sinks.File" Version="5.0.0"/>
 
         <!-- OPC UA -->
-    <PackageReference Include="OPCFoundation.NetStandard.Opc.Ua.Server" Version="1.5.374.126" />
+        <PackageReference Include="OPCFoundation.NetStandard.Opc.Ua.Server" Version="1.5.374.126"/>
 
         <!-- Configuration -->
-    <PackageReference Include="Microsoft.Extensions.Configuration" Version="6.0.1" />
+        <PackageReference Include="Microsoft.Extensions.Configuration" Version="6.0.1"/>
-    <PackageReference Include="Microsoft.Extensions.Configuration.Json" Version="6.0.0" />
+        <PackageReference Include="Microsoft.Extensions.Configuration.Json" Version="6.0.0"/>
-    <PackageReference Include="Microsoft.Extensions.Configuration.EnvironmentVariables" Version="6.0.1" />
+        <PackageReference Include="Microsoft.Extensions.Configuration.EnvironmentVariables" Version="6.0.1"/>
-    <PackageReference Include="Microsoft.Extensions.Configuration.Binder" Version="6.0.0" />
+        <PackageReference Include="Microsoft.Extensions.Configuration.Binder" Version="6.0.0"/>
     </ItemGroup>
 
     <ItemGroup>
         <!-- LDAP authentication -->
-    <Reference Include="System.DirectoryServices.Protocols" />
+        <Reference Include="System.DirectoryServices.Protocols"/>
     </ItemGroup>
 
     <ItemGroup>

src/ZB.MOM.WW.LmxOpcUa.Host/appsettings.json

@@ -53,7 +53,9 @@
     }
   },
   "Security": {
-    "Profiles": ["None"],
+    "Profiles": [
+      "None"
+    ],
     "AutoAcceptClientCertificates": true,
     "RejectSHA1Certificates": true,
     "MinimumCertificateKeySize": 2048,

tests/ZB.MOM.WW.LmxOpcUa.Client.CLI.Tests/AlarmsCommandTests.cs

@@ -20,10 +20,7 @@ public class AlarmsCommandTests
 
         using var console = TestConsoleHelper.CreateConsole();
 
-        var task = Task.Run(async () =>
+        var task = Task.Run(async () => { await command.ExecuteAsync(console); });
-        {
-            await command.ExecuteAsync(console);
-        });
 
         await Task.Delay(100);
         console.RequestCancellation();
@@ -47,10 +44,7 @@ public class AlarmsCommandTests
 
         using var console = TestConsoleHelper.CreateConsole();
 
-        var task = Task.Run(async () =>
+        var task = Task.Run(async () => { await command.ExecuteAsync(console); });
-        {
-            await command.ExecuteAsync(console);
-        });
 
         await Task.Delay(100);
         console.RequestCancellation();
@@ -74,10 +68,7 @@ public class AlarmsCommandTests
 
         using var console = TestConsoleHelper.CreateConsole();
 
-        var task = Task.Run(async () =>
+        var task = Task.Run(async () => { await command.ExecuteAsync(console); });
-        {
-            await command.ExecuteAsync(console);
-        });
 
         await Task.Delay(100);
         console.RequestCancellation();
@@ -104,10 +95,7 @@ public class AlarmsCommandTests
 
         using var console = TestConsoleHelper.CreateConsole();
 
-        var task = Task.Run(async () =>
+        var task = Task.Run(async () => { await command.ExecuteAsync(console); });
-        {
-            await command.ExecuteAsync(console);
-        });
 
         await Task.Delay(100);
         console.RequestCancellation();
@@ -129,10 +117,7 @@ public class AlarmsCommandTests
 
         using var console = TestConsoleHelper.CreateConsole();
 
-        var task = Task.Run(async () =>
+        var task = Task.Run(async () => { await command.ExecuteAsync(console); });
-        {
-            await command.ExecuteAsync(console);
-        });
 
         await Task.Delay(100);
         console.RequestCancellation();
@@ -153,10 +138,7 @@ public class AlarmsCommandTests
 
         using var console = TestConsoleHelper.CreateConsole();
 
-        var task = Task.Run(async () =>
+        var task = Task.Run(async () => { await command.ExecuteAsync(console); });
-        {
-            await command.ExecuteAsync(console);
-        });
 
         await Task.Delay(100);
         console.RequestCancellation();

tests/ZB.MOM.WW.LmxOpcUa.Client.CLI.Tests/BrowseCommandTests.cs

@@ -2,7 +2,6 @@ using Shouldly;
 using Xunit;
 using ZB.MOM.WW.LmxOpcUa.Client.CLI.Commands;
 using ZB.MOM.WW.LmxOpcUa.Client.CLI.Tests.Fakes;
-using ZB.MOM.WW.LmxOpcUa.Client.Shared.Models;
 using BrowseResult = ZB.MOM.WW.LmxOpcUa.Client.Shared.Models.BrowseResult;
 
 namespace ZB.MOM.WW.LmxOpcUa.Client.CLI.Tests;
@@ -16,9 +15,9 @@ public class BrowseCommandTests
         {
             BrowseResults = new List<BrowseResult>
             {
-                new BrowseResult("ns=2;s=Obj1", "Object1", "Object", true),
+                new("ns=2;s=Obj1", "Object1", "Object", true),
-                new BrowseResult("ns=2;s=Var1", "Variable1", "Variable", false),
+                new("ns=2;s=Var1", "Variable1", "Variable", false),
-                new BrowseResult("ns=2;s=Meth1", "Method1", "Method", false)
+                new("ns=2;s=Meth1", "Method1", "Method", false)
             }
         };
         var factory = new FakeOpcUaClientServiceFactory(fakeService);
@@ -85,7 +84,7 @@ public class BrowseCommandTests
         {
             BrowseResults = new List<BrowseResult>
             {
-                new BrowseResult("ns=2;s=Child", "Child", "Object", true)
+                new("ns=2;s=Child", "Child", "Object", true)
             }
         };
         var factory = new FakeOpcUaClientServiceFactory(fakeService);

tests/ZB.MOM.WW.LmxOpcUa.Client.CLI.Tests/CommandBaseTests.cs

@@ -1,4 +1,3 @@
-using CliFx.Infrastructure;
 using Shouldly;
 using Xunit;
 using ZB.MOM.WW.LmxOpcUa.Client.CLI.Commands;

tests/ZB.MOM.WW.LmxOpcUa.Client.CLI.Tests/ConnectCommandTests.cs

@@ -72,7 +72,6 @@ public class ConnectCommandTests
         using var console = TestConsoleHelper.CreateConsole();
         // The command should propagate the exception but still clean up.
         // Since connect fails, service is null in finally, so no disconnect.
-        await Should.ThrowAsync<InvalidOperationException>(
+        await Should.ThrowAsync<InvalidOperationException>(async () => await command.ExecuteAsync(console));
-            async () => await command.ExecuteAsync(console));
     }
 }

tests/ZB.MOM.WW.LmxOpcUa.Client.CLI.Tests/Fakes/FakeOpcUaClientService.cs

@@ -6,7 +6,7 @@ using BrowseResult = ZB.MOM.WW.LmxOpcUa.Client.Shared.Models.BrowseResult;
 namespace ZB.MOM.WW.LmxOpcUa.Client.CLI.Tests.Fakes;
 
 /// <summary>
-/// Fake implementation of <see cref="IOpcUaClientService"/> for unit testing commands.
+///     Fake implementation of <see cref="IOpcUaClientService" /> for unit testing commands.
 ///     Records all method calls and returns configurable results.
 /// </summary>
 public sealed class FakeOpcUaClientService : IOpcUaClientService
@@ -16,20 +16,24 @@ public sealed class FakeOpcUaClientService : IOpcUaClientService
     public ConnectionSettings? LastConnectionSettings { get; private set; }
     public bool DisconnectCalled { get; private set; }
     public bool DisposeCalled { get; private set; }
-    public List<NodeId> ReadNodeIds { get; } = new();
+    public List<NodeId> ReadNodeIds { get; } = [];
-    public List<(NodeId NodeId, object Value)> WriteValues { get; } = new();
+    public List<(NodeId NodeId, object Value)> WriteValues { get; } = [];
-    public List<NodeId?> BrowseNodeIds { get; } = new();
+    public List<NodeId?> BrowseNodeIds { get; } = [];
-    public List<(NodeId NodeId, int IntervalMs)> SubscribeCalls { get; } = new();
+    public List<(NodeId NodeId, int IntervalMs)> SubscribeCalls { get; } = [];
-    public List<NodeId> UnsubscribeCalls { get; } = new();
+    public List<NodeId> UnsubscribeCalls { get; } = [];
-    public List<(NodeId? SourceNodeId, int IntervalMs)> SubscribeAlarmsCalls { get; } = new();
+    public List<(NodeId? SourceNodeId, int IntervalMs)> SubscribeAlarmsCalls { get; } = [];
     public bool UnsubscribeAlarmsCalled { get; private set; }
     public bool RequestConditionRefreshCalled { get; private set; }
-    public List<(NodeId NodeId, DateTime Start, DateTime End, int MaxValues)> HistoryReadRawCalls { get; } = new();
+    public List<(NodeId NodeId, DateTime Start, DateTime End, int MaxValues)> HistoryReadRawCalls { get; } = [];
-    public List<(NodeId NodeId, DateTime Start, DateTime End, AggregateType Aggregate, double IntervalMs)> HistoryReadAggregateCalls { get; } = new();
+
+    public List<(NodeId NodeId, DateTime Start, DateTime End, AggregateType Aggregate, double IntervalMs)>
+        HistoryReadAggregateCalls { get; } =
+        [];
+
     public bool GetRedundancyInfoCalled { get; private set; }
 
     // Configurable results
-    public ConnectionInfo ConnectionInfoResult { get; set; } = new ConnectionInfo(
+    public ConnectionInfo ConnectionInfoResult { get; set; } = new(
         "opc.tcp://localhost:4840",
         "TestServer",
         "None",
@@ -37,7 +41,7 @@ public sealed class FakeOpcUaClientService : IOpcUaClientService
         "session-1",
         "TestSession");
 
-    public DataValue ReadValueResult { get; set; } = new DataValue(
+    public DataValue ReadValueResult { get; set; } = new(
         new Variant(42),
         StatusCodes.Good,
         DateTime.UtcNow,
@@ -47,18 +51,18 @@ public sealed class FakeOpcUaClientService : IOpcUaClientService
 
     public IReadOnlyList<BrowseResult> BrowseResults { get; set; } = new List<BrowseResult>
     {
-        new BrowseResult("ns=2;s=Node1", "Node1", "Object", true),
+        new("ns=2;s=Node1", "Node1", "Object", true),
-        new BrowseResult("ns=2;s=Node2", "Node2", "Variable", false)
+        new("ns=2;s=Node2", "Node2", "Variable", false)
     };
 
     public IReadOnlyList<DataValue> HistoryReadResult { get; set; } = new List<DataValue>
     {
-        new DataValue(new Variant(10.0), StatusCodes.Good, DateTime.UtcNow.AddHours(-1), DateTime.UtcNow),
+        new(new Variant(10.0), StatusCodes.Good, DateTime.UtcNow.AddHours(-1), DateTime.UtcNow),
-        new DataValue(new Variant(20.0), StatusCodes.Good, DateTime.UtcNow, DateTime.UtcNow)
+        new(new Variant(20.0), StatusCodes.Good, DateTime.UtcNow, DateTime.UtcNow)
     };
 
-    public RedundancyInfo RedundancyInfoResult { get; set; } = new RedundancyInfo(
+    public RedundancyInfo RedundancyInfoResult { get; set; } = new(
-        "Warm", 200, new[] { "urn:server1", "urn:server2" }, "urn:app:test");
+        "Warm", 200, ["urn:server1", "urn:server2"], "urn:app:test");
 
     public Exception? ConnectException { get; set; }
     public Exception? ReadException { get; set; }
@@ -159,6 +163,11 @@ public sealed class FakeOpcUaClientService : IOpcUaClientService
         return Task.FromResult(RedundancyInfoResult);
     }
 
+    public void Dispose()
+    {
+        DisposeCalled = true;
+    }
+
     /// <summary>Raises the DataChanged event for testing subscribe commands.</summary>
     public void RaiseDataChanged(string nodeId, DataValue value)
     {
@@ -176,9 +185,4 @@ public sealed class FakeOpcUaClientService : IOpcUaClientService
     {
         ConnectionStateChanged?.Invoke(this, new ConnectionStateChangedEventArgs(oldState, newState, endpointUrl));
     }
-
-    public void Dispose()
-    {
-        DisposeCalled = true;
-    }
 }