void dialog_OnComplete(object sender, LoginTwitterDialogCompleteArgs e)
        {
            LoginTwitterDialog dialog = sender as LoginTwitterDialog;

            if (dialog != null)
            {
                try {
                    ActionTwitterLoginArgs arg = _waiting[dialog];
                    arg.ParentLayout.Children.Remove(dialog.Dialog);
                    arg.Result = e;
                    Done(arg);
                } catch (Exception ex) {
                    //throw ex;
                }
            }
            else
            {
                Exception ex = new Exception("Twitter login dialog error");
                //throw ex;
            }
        }
 public ActionTwitterLoginArgs(Grid layout)
 {
     ParentLayout = layout;
     Result       = null;
 }