diff --git a/Sample Applications/WPFGallery/MainWindow.xaml.cs b/Sample Applications/WPFGallery/MainWindow.xaml.cs
index d692614b..3f164b4b 100644
--- a/Sample Applications/WPFGallery/MainWindow.xaml.cs	
+++ b/Sample Applications/WPFGallery/MainWindow.xaml.cs	
@@ -89,7 +89,7 @@ private void ControlsList_SelectedItemChanged()
             var tvi = ControlsList.ItemContainerGenerator.ContainerFromItem(navItem) as TreeViewItem;
             if(tvi != null)
             {
-                tvi.IsExpanded = true;
+                tvi.IsExpanded = !tvi.IsExpanded;
                 tvi.BringIntoView();
             }
         }