public Matrix<T> this[
	Range rowRange,
	IEnumerable<int> columnIndexes
] { get; set; }

Public Default Property Item ( 
	rowRange As Range,
	columnIndexes As IEnumerable(Of Integer)
) As Matrix(Of T)
	Get
	Set

public:
property Matrix<T>^ default[Range rowRange, IEnumerable<int>^ columnIndexes] {
	Matrix<T>^ get (Range rowRange, IEnumerable<int>^ columnIndexes);
	void set (Range rowRange, IEnumerable<int>^ columnIndexes, Matrix<T>^ value);
}

member Item : Matrix<'T> with get, set