// helper method used by ContainerFromElement
private static bool IsContainerForItemsControl(DependencyObject element, ItemsControl itemsControl)
{
// is the element a container?
if (element.ContainsValue(ItemContainerGenerator.ItemForItemContainerProperty))
{
// does the element belong to the itemsControl?
if (itemsControl == null || itemsControl == ItemsControlFromItemContainer(element))
{
return true;
}
}
return false;
}