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

Its not entirely accurate about it not being possible to host a window in a frame, the following code will do it for you

    public void HostWindowInFrame(Frame fraContainer, Window win) {
        object tmp = win.Content;
        win.Content = null;
        fraContainer.Content = new ContentControl() { Content = tmp };
    }