Adds Database Structure in C# with Entity Framework

WatchLog/Data/Database/Shared/LinkTableSharedStreamingPlatform.cs

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