diff --git a/sandbox/ConsoleApp/Program.cs b/sandbox/ConsoleApp/Program.cs
index f2b8a02..0a55a4c 100644
--- a/sandbox/ConsoleApp/Program.cs
+++ b/sandbox/ConsoleApp/Program.cs
@@ -18,8 +18,6 @@
 list.AddRange(new[] { 10, 20, 30 });
 
 
-return;
-
 
 
 
diff --git a/sandbox/WpfApp/MainWindow.xaml.cs b/sandbox/WpfApp/MainWindow.xaml.cs
index afd9981..c7deb25 100644
--- a/sandbox/WpfApp/MainWindow.xaml.cs
+++ b/sandbox/WpfApp/MainWindow.xaml.cs
@@ -23,7 +23,7 @@ namespace WpfApp
     public partial class MainWindow : Window
     {
         ObservableList<int> list;
-        public ISynchronizedView<int, int> ItemsView { get; set; }
+        public INotifyCollectionChangedSynchronizedView<int> ItemsView { get; set; }
 
         public MainWindow()
         {
@@ -35,7 +35,7 @@ public MainWindow()
 
             list = new ObservableList<int>();
             list.AddRange(new[] { 1, 10, 188 });
-            ItemsView = list.CreateSortedView(x => x, x => x, comparer: Comparer<int>.Default).WithINotifyCollectionChanged();
+            ItemsView = list.CreateSortedView(x => x, x => x, comparer: Comparer<int>.Default).ToNotifyCollectionChanged();
 
 
             BindingOperations.EnableCollectionSynchronization(ItemsView, new object());
diff --git a/src/ObservableCollections/IObservableCollection.cs b/src/ObservableCollections/IObservableCollection.cs
index ca9d4de..42c7cec 100644
--- a/src/ObservableCollections/IObservableCollection.cs
+++ b/src/ObservableCollections/IObservableCollection.cs
@@ -45,7 +45,7 @@ public interface ISortableSynchronizedView<T, TView> : ISynchronizedView<T, TVie
     //{
     //}
 
-    public interface INotifyCollectionChangedSynchronizedView<out TView> : IReadOnlyCollection<TView>, INotifyCollectionChanged, INotifyPropertyChanged
+    public interface INotifyCollectionChangedSynchronizedView<out TView> : IReadOnlyCollection<TView>, INotifyCollectionChanged, INotifyPropertyChanged, IDisposable
     {
     }