public void Handle(AudioPlayerClosedEvent message)
 {
     this.StopTrackingPosition();
     this.IsStopped = true;
 }
 public void Handle(AudioPlayerClosedEvent message)
 {
     ((UIElement)this.borderPlay).Visibility  = Visibility.Visible;
     ((UIElement)this.borderPause).Visibility = Visibility.Collapsed;
 }