public ElementCollectionChangedEventArgs(IElementCollection collection,
CollectionChangeAction action,
IEnumerable <CollectionChangeItemInfo> changedItems)
{
Collection = collection;
Action = action;
ChangedItems = changedItems.ToArray();
ElementType = CollectionExtensions.GetCollectionType(collection.GetType());
if (ElementType == null)
{
ElementType = ChangedItems[0].Element.GetElementType();
}
}
