public GamePage()
{
if (Instance != null)
{
throw new InvalidOperationException("There can be only one GamePage object!");
}
Instance = this;
InitializeComponent();
game = new Main();
game.CInitialize();
// Create a timer for this page
timer = new GameTimer();
timer.UpdateInterval = TimeSpan.FromTicks(333333);
timer.Update += OnUpdate;
timer.Draw += OnDraw;
adView.Visibility = Visibility.Collapsed;
}