Updated: February 2009
Specifies the method the VirtualizingStackPanel uses to manage virtualizing its child items.
Assembly: PresentationFramework (in PresentationFramework.dll)
By default, a VirtualizingStackPanel creates an item container for each visible item and discards it when it is no longer needed (such as when the item is scrolled out of view). When an ItemsControl contains a many items, the process of creating and discarding item containers can negatively affect performance. When VirtualizationMode is set to , the VirtualizingStackPanel reuses item containers instead of creating a new one each time.
When VirtualizingStackPanel cannot recycle item containers, it uses the standard mode of virtualization, which is to create and discard item containers for each item. The following list describes cases when the VirtualizingStackPanel cannot recycle item containers:
You explicitly create the item containers for the ItemsControl. For more information about explicitly versus implicitly creating item containers, see the "Item Container Classes" section in Controls Content Model Overview.
The following example shows the data used in the previous example.
Windows 7, Windows Vista, Windows XP SP2, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003
The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.