How to hide the Backstage Button in Ribbon?

This does not work.

Can you provide a working sample?

This worked:

XAML

MainWindow.cs

        public MainWindow()
        {
            InitializeComponent();
            ribbon.BackStage.Loaded += BackStage_Loaded;

        }

        private void BackStage_Loaded(object sender, RoutedEventArgs e)
        {
            if (ribbon != null && ribbon.BackStageButton != null)
            {
                ribbon.BackStageButton.Visibility = Visibility.Collapsed;
            }
        }

And how to do that with RibbonControlAdv? There is no property called BackStageButton.