static void Main(string[] args) { double[,] values = new double[, ] { { 2, 1, 1, 2 }, { 1, -1, 0, -2 }, { 3, -1, 2, 2 } }; Matrix matrix = new Matrix(values); Console.WriteLine(matrix); Console.WriteLine(matrix.GetMinor(1, 2)); Console.WriteLine(matrix.ReductionTriangularMatrix()); Console.ReadKey(); }