System.Windows.Input.Key：xaml中的方括号？

Key.OemOpenBrackets

Key.OemCloseBrackets

<Window.CommandBindings>
    <CommandBinding Command=\"Help\" Executed=\"Help_Executed\" CanExecute=\"Help_CanExecute\"/>
</Window.CommandBindings>
<Window.InputBindings>
    <KeyBinding Key=\"OemOpenBrackets\" Command=\"Help\" Modifiers=\"Control\"/>
</Window.InputBindings>

private void Help_Executed(object sender, ExecutedRoutedEventArgs e)
{
    MessageBox.Show(\"!\");
}

private void Help_CanExecute(object sender, CanExecuteRoutedEventArgs e)
{
    e.CanExecute = true;
}