Switching between Windows Store XAML GUI and Unity game

Hi

In a Windows Store application (XAML/C#, 8.1) is it possible to go back and forth between standard Windows Store XAML GUI and different Unity scenes?

I am trying to have my startup menu, level selection GUI etc. as standard Windows Store XAML/C# code (not using any Unity stuff) and only jump into Unity when the player selects a level. Starting with a XAML/C# menu when the game starts and then jump into Unity when the player select a level works fine – using one XAML page for the menu and one for the Unity game.

My problem is how to get back out of Unity when the level is completed or user want to return to the XAML menu.

If I use Application.Quit in Unity my application completely exits. I also tried AppCallbacks.Dispose from the XAML/C# side but it crashed.

Any suggestions on how to return from a Unity scene to my XAML GUI?

/Christian