public virtual ItemType this[
	int index
] { get; set; }

Public Overridable Default Property Item ( 
	index As Integer
) As ItemType
	Get
	Set

public:
virtual property ItemType default[int index] {
	ItemType get (int index);
	void set (int index, ItemType value);
}

abstract Item : 'ItemType with get, set
override Item : 'ItemType with get, set