Why does a WPF Popup close when its background area is clicked?

Question

I have a WPF Popup control that contains some editing controls (list boxes, text boxes, check boxes) laid out with quite a bit of whitespace.

Popu

Answer 1

Don't you have your Popup nested in a ToggleButton or other kind of Button? Then stopping the routed event at Popup level would be logical to get working.