internal void InvokeFriendStateChanged(MessengerFriendEventArgs e)
 {
     if (OnFriendStateChanged != null)
     {
         OnFriendStateChanged.Invoke(this, e);
     }
 }
 internal void InvokeFriendStateChanged(MessengerFriendEventArgs e)
 {
     if (OnFriendStateChanged != null)
         OnFriendStateChanged.Invoke(this, e);
 }