private void confirm()
 {
     if (UserNameTextBox.Text.Equals("Username") || String.IsNullOrWhiteSpace(UserNameTextBox.Text))
     {
         ErrorMessage.Visibility = Visibility.Visible;
     }
     else
     {
         result = LoginDialogResult.OK;
         HideHandlerDialog();
     }
 }
		private void CancelButtonClick(object sender, RoutedEventArgs e)
		{
			result = LoginDialogResult.Cancel;
			HideHandlerDialog();
		}