将MahApps.Metro样式应用于NavigationWindow

Has anyone had any luck applying the MahApps.Metro style to a NavigationWindow? I have implemented it for a Window just fine, but need to apply it to a NavigationWindow with Pages. I tried extending NavigationWindow and adding the modifications from MetroWindow like so, but no luck. The Window has a standard title bar and border, and the content is completely black.Has anyone had any luck applying the MahApps.Me