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

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

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

abstract Item : 'T with get, set
override Item : 'T with get, set