[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]
When overridden in a derived class, positions child elements and determines a size for a FrameworkElement derived class.
Assembly: Microsoft.Phone (in Microsoft.Phone.dll)
Windows Phone will always lay out the RootVisual in portrait orientation with the origin at the top-left corner of the physical screen. However, the PhoneApplicationFrame class switches the Width and Height during the arrange and measure passes, in addition to applying a rotate transform, in order to display content in landscape mode.