Scrolls content upward by one page.
Assembly: PresentationFramework (in PresentationFramework.dll)
You can override in a derived class to change how the stack panel responds to the page up action.
If you require physical scrolling instead of logical scrolling, wrap the VirtualizingStackPanel in a ScrollViewer and set its CanContentScroll property to false. In this case, the ScrollViewer provides scrolling, and virtualization is disabled.
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.