Improvements

ShellDemo/App.xaml.cs

@@ -9,6 +9,10 @@ public partial class App : Application
     public App()
     {
         InitializeComponent();
-        MainPage = new AppShell();
+    }
+
+    protected override Window CreateWindow(IActivationState? activationState)
+    {
+        return new Window(new AppShell());
     }
 }