private static void ExecutedCutRoutedCommand(object sender, ExecutedRoutedEventArgs e)
{
RichTextBoxEx richTextBoxEx = sender as RichTextBoxEx;
if (richTextBoxEx != null)
{
if (!richTextBoxEx.IsReadOnly && !richTextBoxEx.IsReadOnlyWithNavigation)
{
richTextBoxEx.Cut();
}
e.Handled = true;
}
}
