protected void OnPlaybackInfoRetrieved(PlaybackInfoEventArgs e)
 {
     if (PlaybackInfoRetrieved != null)
     {
         PlaybackInfoRetrieved(this, e);
     }
 }
 protected void OnPlaybackInfoRetrieved(PlaybackInfoEventArgs e)
 {
     if (PlaybackInfoRetrieved != null)
     {
         PlaybackInfoRetrieved(this, e);
     }
 }