ObservableCollectionLookupTKey, TItem, TCollectionRemoveItem - метод

protected override void RemoveItem(
	int index
)

Protected Overrides Sub RemoveItem ( 
	index As Integer
)

protected:
virtual void RemoveItem(
	int index
) override

abstract RemoveItem : 
        index : int -> unit 
override RemoveItem : 
        index : int -> unit