public static void IOExample()
{
double[,] m = {{2, 3, 3, 5},
{6, 6, 8, 9},
{10, 11, 12, 13},
{14, 15, 17, 17}};
PZMath_matrix matrix = new PZMath_matrix(m);
matrix.WriteFile("matrix.txt");
PZMath_matrix readMatrix = new PZMath_matrix();
readMatrix.ReadFile("matrix.txt");
readMatrix.ScreenWriteLine();
}