private void OnManipulationCompleted(object sender, C1InputEventArgs e)
 {
     FramePanel.Background = new SolidColorBrush(Colors.White);
 }
 private void OnManipulationStarted(object sender, C1InputEventArgs e)
 {
     FramePanel.Background = new SolidColorBrush(Colors.LightGray);
 }