diff --git a/sandbox/WpfApp/MainWindow.xaml b/sandbox/WpfApp/MainWindow.xaml
index 4b92710..a9a07e9 100644
--- a/sandbox/WpfApp/MainWindow.xaml
+++ b/sandbox/WpfApp/MainWindow.xaml
@@ -7,6 +7,14 @@
         mc:Ignorable="d"
         Title="MainWindow" Height="450" Width="800">
     <Grid>
+        <Grid.ColumnDefinitions>
+            <ColumnDefinition />
+            <ColumnDefinition />
+        </Grid.ColumnDefinitions>
+
+        <ListView ItemsSource="{Binding ItemsView}"></ListView>
+        
+        <Button Grid.Column="1" Click="Button_Click">Insert</Button>
 
     </Grid>
 </Window>
diff --git a/sandbox/WpfApp/MainWindow.xaml.cs b/sandbox/WpfApp/MainWindow.xaml.cs
index 3befea9..38ab9bf 100644
--- a/sandbox/WpfApp/MainWindow.xaml.cs
+++ b/sandbox/WpfApp/MainWindow.xaml.cs
@@ -1,7 +1,9 @@
-using System;
+using ObservableCollections;
+using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;
+using System.Threading;
 using System.Threading.Tasks;
 using System.Windows;
 using System.Windows.Controls;
@@ -20,9 +22,33 @@ namespace WpfApp
     /// </summary>
     public partial class MainWindow : Window
     {
+        ObservableList<int> list;
+        public ISynchronizedView<int, int> ItemsView { get; set; }
+
         public MainWindow()
         {
             InitializeComponent();
+            this.DataContext = this;
+
+
+
+
+            list = new ObservableList<int>();
+            list.AddRange(new[] { 1, 10, 188 });
+            ItemsView = list.CreateSortedView(x => x, x => x, comparer: Comparer<int>.Default).WithINotifyCollectionChanged();
+
+
+            BindingOperations.EnableCollectionSynchronization(ItemsView, new object());
+        }
+
+        int adder = 99;
+
+        private void Button_Click(object sender, RoutedEventArgs e)
+        {
+            ThreadPool.QueueUserWorkItem(_ =>
+            {
+                list.Add(adder++);
+            });
         }
     }
 }
diff --git a/sandbox/WpfApp/WpfApp.csproj b/sandbox/WpfApp/WpfApp.csproj
index 4106cb0..d394da3 100644
--- a/sandbox/WpfApp/WpfApp.csproj
+++ b/sandbox/WpfApp/WpfApp.csproj
@@ -7,4 +7,8 @@
     <UseWPF>true</UseWPF>
   </PropertyGroup>
 
+  <ItemGroup>
+    <ProjectReference Include="..\..\src\ObservableCollections\ObservableCollections.csproj" />
+  </ItemGroup>
+
 </Project>