protected override void ClearContainerForItemOverride(DependencyObject element, object item)
{
FrameworkElement previousContainer = itemsSourceHelper.GetPreviousContainer(item);
FrameworkElement nextContainer = itemsSourceHelper.GetNextContainer(item);
if (previousContainer != null)
{
if (nextContainer == null)
{
previousContainer.Margin = ItemsControlHelper.GetLastItemMargin(this);
}
else
{
previousContainer.Margin = ItemsControlHelper.GetRegularItemMargin(this);
}
}
itemsSourceHelper.UnregisterItemContainerPair(item);
base.ClearContainerForItemOverride(element, item);
}