WPF root element is not valid for navigation

Question

I am converting a WPF XBAP app to a WPF desktop app. I have it running on the desktop, but am now trying to change the Page references to Window references.

Answer 1

please check StartForm having the page as root element or some other else. I am having the same. I have check the page which has to be navigated. I declare that page as window.