CollectionChangedHandlerTItem, TCollectionAddRange Method

public virtual void AddRange(
	IEnumerable<TItem> items
)

Public Overridable Sub AddRange ( 
	items As IEnumerable(Of TItem)
)

abstract AddRange : 
        items : IEnumerable<'TItem> -> unit 
override AddRange : 
        items : IEnumerable<'TItem> -> unit 

This simply calls AddItem(TItem) for each item in the list. If there is a faster mechanism for doing so, implementors should override this method. For example, sometimes adding a single item will update the UI for each item, this should be overridden so the UI is updated after all items have been added.