private void Avatar_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
        {
            PopUpHeaderSelectWindow uploadWin = new PopUpHeaderSelectWindow(this);
            bool?success = uploadWin.ShowDialog();

            if (!success.Value)
            {
                return;
            }

            LoginManager.Instance.DownloadLoginUserAvatar();
        }
 public IMAdorner(UIElement adorned, PopUpHeaderSelectWindow parent)
     : base(adorned)
 {
     _parent = parent;
 }