Matrix2dBuilderElementAt Property

public double this[
        int i,
        int j
] { get; set; }

Public Default Property ElementAt ( 
        i As Integer,
        j As Integer
) As Double
        Get
        Set

public:
property double default[int i, int j] {
        double get (int i, int j);
        void set (int i, int j, double value);
}

member ElementAt : float with get, set