using System.ComponentModel.DataAnnotations; namespace ZB.MOM.WW.CBDDC.Sample.Console; public class User { /// /// Gets or sets the unique user identifier. /// [Key] public string Id { get; set; } = ""; /// /// Gets or sets the user name. /// public string? Name { get; set; } /// /// Gets or sets the user age. /// public int Age { get; set; } /// /// Gets or sets the user address. /// public Address? Address { get; set; } } public class Address { /// /// Gets or sets the city value. /// public string? City { get; set; } }