private static void OnPreTextChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
        {
            ucToggleButton ctrl = d as ucToggleButton;

            ctrl.PreText = (String)e.NewValue;
        }
        private static void IsCheckedChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
        {
            ucToggleButton ctrl = d as ucToggleButton;

            ctrl.IsChecked = (bool?)e.NewValue;
        }