public override double this[
	params int[] idx
] { get; set; }

Public Overrides Default Property Item ( 
	ParamArray idx As Integer()
) As Double
	Get
	Set

public:
virtual property double default[... array<int>^ idx] {
	double get (... array<int>^ idx) override;
	void set (... array<int>^ idx, double value) override;
}

abstract Item : float with get, set
override Item : float with get, set