private static void OnMessageTextChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
        {
            BackButtonControl borderControl = d as BackButtonControl;

            borderControl.OnMessageTextChanged(e);
        }
        private static void OnSetButtonVisibilityChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
        {
            BackButtonControl borderControl = d as BackButtonControl;

            borderControl.OnSetButtonVisibilityChanged(e);
        }