Complete UWP app (without translations)

GUT.Schedule/GUTSchedule.UWP/App.xaml.cs

@@ -38,11 +38,9 @@ namespace GUTSchedule.UWP
 		/// <param name="e">Details about the launch request and process.</param>
 		protected override void OnLaunched(LaunchActivatedEventArgs e)
 		{
-			Frame rootFrame = Window.Current.Content as Frame;
-
 			// Do not repeat app initialization when the Window already has content,
 			// just ensure that the window is active
-			if (rootFrame == null)
+			if (!(Window.Current.Content is Frame rootFrame))
 			{
 				// Create a Frame to act as the navigation context and navigate to the first page
 				rootFrame = new Frame();