Adds Database Structure in C# with Entity Framework

WatchLog/Data/Database/Shared/LinkTableSharedLabel.cs

@@ -0,0 +1,22 @@
+using System.ComponentModel.DataAnnotations.Schema;
+using Microsoft.EntityFrameworkCore;
+
+namespace WatchLog.Data
+{
+    [PrimaryKey(nameof(SharedListLabelId), nameof(SharedListEntityId))]
+    public class LinkTableSharedLabel
+    {
+        // --- Foreign Keys ---
+        public int SharedListLabelId { get; set; }
+
+        public int SharedListEntityId { get; set; }
+
+
+        // --- Navigation Properties ---
+        [ForeignKey(nameof(SharedListLabelId))]
+        public virtual SharedListLabel SharedListLabel { get; set; } = null!;
+
+        [ForeignKey(nameof(SharedListEntityId))]
+        public virtual SharedListEntity SharedListEntity { get; set; } = null!;
+    }
+}