protected override void OnNavigatedTo(NavigationEventArgs e)
{
// Set the sharing mode of the graphics device to turn on XNA rendering
SharedGraphicsDeviceManager.Current.GraphicsDevice.SetSharingMode(true);
spriteBatch = new SpriteBatch(SharedGraphicsDeviceManager.Current.GraphicsDevice);
Global.GraphicsDevice = spriteBatch.GraphicsDevice;
SetWindowSize();
load = new LoadScene(this);
scene = load;
load.Initialize();
load.running = true;
timer.Start();
base.OnNavigatedTo(e);
}