diff --git a/GeometryTest/App.xaml.cs b/GeometryTest/App.xaml.cs
index f1c68bc..57cee57 100644
--- a/GeometryTest/App.xaml.cs
+++ b/GeometryTest/App.xaml.cs
@@ -13,5 +13,11 @@ namespace GeometryTest
     /// </summary>
     public partial class App : Application
     {
+        protected override void OnStartup(StartupEventArgs e)
+        {
+            base.OnStartup(e);
+
+            Resources.Add("polygon", Polygon.Instance);
+        }
     }
 }