private void TEXT_Password_LostFocus(object sender, RoutedEventArgs e)
 {
     if (string.IsNullOrEmpty(TEXT_Password.ToString()))
     {
         TEXT_Password.Visibility       = System.Windows.Visibility.Collapsed;
         watermarkedTextPass.Visibility = System.Windows.Visibility.Visible;
     }
 }
 private void watermarkedTextPass_GotFocus(object sender, RoutedEventArgs e)
 {
     watermarkedTextPass.Visibility = System.Windows.Visibility.Collapsed;
     TEXT_Password.Visibility       = System.Windows.Visibility.Visible;
     TEXT_Password.Focus();
 }