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vscode/Chapter10/Ch10Ex02DataSerialization/Category.cs

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+using System.ComponentModel.DataAnnotations.Schema; // [Column]
+
+namespace Packt.Shared;
+
+public class Category
+{
+  // these properties map to columns in the database
+  public int CategoryId { get; set; }
+
+  public string? CategoryName { get; set; }
+
+  [Column(TypeName = "ntext")]
+  public string? Description { get; set; }
+
+  // defines a navigation property for related rows
+  public virtual ICollection<Product> Products { get; set; }
+
+  public Category()
+  {
+    // to enable developers to add products to a Category we must
+    // initialize the navigation property to an empty collection
+    Products = new HashSet<Product>();
+  }
+}