ObservableCollectionLookupTKey, TItem, TCollectionInsertItem - метод

protected override void InsertItem(
	int index,
	TItem item
)

Protected Overrides Sub InsertItem ( 
	index As Integer,
	item As TItem
)

protected:
virtual void InsertItem(
	int index, 
	TItem item
) override

abstract InsertItem : 
        index : int * 
        item : 'TItem -> unit 
override InsertItem : 
        index : int * 
        item : 'TItem -> unit