WPF menu item that doesn't close when clicked

Question

Is it possible to make a WPF menu item that, when clicked, does not close the dropdown menu?

Imagine a Preferences menu, with several checkbox-style preference setti

Answer 1

Would the Popup visual be of any use here? You can show it at any position above your window. IIRC you must tell the popup to close yourself, so you can define when the popup is closed.

Using proper layout you can make it look like a menu or dropdown thing.