WPF: Best way to raise a popup window that is modal to the page?

Question

I am building a WPF app using navigation style pages and not windows. I want to show a window inside a page, this window must be modal to the page, but allow the user to go to

Answer 1

Windows doesn't like you to do that - it's not a WPF thing. Use an overlying panel and use the visible or zorder property.

Wikipedia has a good discussion.