How do I listen to click events on all the MenuItems through the parent ContextMenu?

Instead of setting up event handlers on all the MenuItems you can listen to those events as they bubble up to the context menu as follows:

[XAML]

            MenuItem1
            MenuItem2
            MenuItem3
            MenuItem4

Or you can setup the same thing in code as follows:

[C#]
menuItem1.AddHandler(MenuItem.ClickEvent, new RoutedEventHandler(MnItem_Click));

The event handler would then be something like:

private void MnItem_Click(object sender, RoutedEventArgs e)
{
	MenuItem item = e.Source as MenuItem;
            
	....
}