public override void FinishedLaunching(MonoMac.Foundation.NSObject notification)
{
// Don't use 'using' to dispose of this
// On Mac, the game is run on a background thread
_game = new ShowcaseGame();
_game.Run();
}
public override void WillTerminate(NSNotification notification)
{
_game.Dispose();
_game = null;
}