public bool AddWhisperListener(WhisperCallback callback, object userData)
    {
        WhisperListener item = new WhisperListener();

        item.SetCallback(callback);
        item.SetUserData(userData);
        if (this.m_whisperListeners.Contains(item))
        {
            return(false);
        }
        this.m_whisperListeners.Add(item);
        return(true);
    }
 public bool AddWhisperListener(WhisperCallback callback)
 {
     return(this.AddWhisperListener(callback, null));
 }