/// <summary>
 /// Removes a completion delegate.
 /// </summary>
 /// <param name='completionDel'>
 /// Completion del.
 /// </param>
 public void RemoveCompletionDelegate(OnPlaylistComplete completionDel)
 {
     onPlaylistComplete -= completionDel;
 }
 /// <summary>
 /// Registers a completion delegate.
 /// </summary>
 /// <param name='completionDel'>
 /// Completion del.
 /// </param>
 public void RegisterCompletionDelegate(OnPlaylistComplete completionDel)
 {
     onPlaylistComplete += completionDel;
 }