Returns an item container to the state it was in before PrepareContainerForItemOverride.
Assembly: PresentationFramework (in PresentationFramework.dll)
clears the Selector.IsSelected attached property when the item container is removed from the visual tree. This is done so item containers behave correctly when the Selector uses container recycling. For more information, see VirtualizationMode and "Container Recycling" in Optimizing Performance: Controls.