Adds Database Structure in C# with Entity Framework

WatchLog/Data/Database/Private/LinkTablePrivateLabel.cs

@@ -0,0 +1,21 @@
+using System.ComponentModel.DataAnnotations.Schema;
+using Microsoft.EntityFrameworkCore;
+
+namespace WatchLog.Data
+{
+    [PrimaryKey(nameof(PrivateEntityId), nameof(LabelId))]
+    public class LinkTablePrivateLabel
+    {
+        // --- Foreign Keys ---
+        public int PrivateEntityId { get; set; }
+        public int LabelId { get; set; }
+
+
+        // --- Navigation Properties ---
+        [ForeignKey(nameof(PrivateEntityId))]
+        public virtual PrivateEntity PrivateEntity { get; set; } = null!;
+
+        [ForeignKey(nameof(LabelId))]
+        public virtual Label Label { get; set; } = null!;
+    }
+}