private void appBar_StateChanged(object sender, ApplicationBarStateChangedEventArgs e)
{
//switch (appBarState++)
//{
// case 0:
// ApplicationBar.IsMenuEnabled = false;
// ApplicationBar.Mode = ApplicationBarMode.Default;
// ApplicationBar.IsMenuEnabled = true;
// break;
// case 2:
// ApplicationBar.Mode = ApplicationBarMode.Minimized;
// break;
// case 4:
// ApplicationBar.IsMenuEnabled = false;
// ApplicationBar.Mode = ApplicationBarMode.Default;
// ApplicationBar.Mode = ApplicationBarMode.Minimized;
// ApplicationBar.IsMenuEnabled = true;
// appBarState = 0;
// break;
//}
}