diff --git a/OwnModel.cs b/OwnModel.cs
index b20b91f..6838a70 100644
--- a/OwnModel.cs
+++ b/OwnModel.cs
@@ -9,7 +9,7 @@ namespace BlubbFish.Utils
   public abstract class OwnModel<T> where T : class
   {
     private static readonly Lazy<T> _instance = new Lazy<T>(() => CreateInstanceOfT());
-    private List<OwnView> observer = new List<OwnView>();
+    private readonly List<OwnView> observer = new List<OwnView>();
     public static T Instance
     {
       get {
@@ -35,5 +35,6 @@ namespace BlubbFish.Utils
       this.observer.ForEach(delegate (OwnView view) { view.Update(); });
     }
     abstract protected void Init();
+    abstract public void Dispose();
   }
 }
diff --git a/bin/Release/Utils.dll b/bin/Release/Utils.dll
index f250fbf..3193878 100644
Binary files a/bin/Release/Utils.dll and b/bin/Release/Utils.dll differ