Add FishNet network library

Assets/FishNet/Runtime/Serializing/SceneComparer.cs

@@ -0,0 +1,19 @@
+using FishNet.Utility.Extension;
+using System.Collections.Generic;
+using UnityEngine.SceneManagement;
+
+namespace FishNet.Serializing.Helping
+{
+    internal sealed class SceneHandleEqualityComparer : EqualityComparer<Scene>
+    {
+        public override bool Equals(Scene a, Scene b)
+        {
+            return a.GetRawHandle() == b.GetRawHandle();
+        }
+
+        public override int GetHashCode(Scene obj)
+        {
+            return obj.GetRawHandle().GetHashCode();
+        }
+    }
+}