public T this[
	int xIndex,
	int yIndex
] { get; set; }

Public Default Property Item ( 
	xIndex As Integer,
	yIndex As Integer
) As T
	Get
	Set

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

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