VirtualizingStackPanel.VirtualizationMode Attached Property
Gets or sets how a panel in an ItemsControl virtualizes its child items.
Assembly: System.Windows (in System.Windows.dll)
<object VirtualizingStackPanel.VirtualizationMode="Standard"/> -or- <object VirtualizingStackPanel.VirtualizationMode="Recycling"/>
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 lot of items, the process of creating and discarding item containers can negatively affect performance. When the attached property is set to Recycling, 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.
For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.