Stackoverflow did not recognize the code, sorry for the inc

    class txt_program
    {
        public void txt()
        {
            /* 0 */
            int[] M_array_0 = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
            /* 1 */
            int[] M_array_1 = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
            /* 2 */
            int[] M_array_2 = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
            // etc.

            // the M matrix
            int[][] M = { M_array_0, M_array_1, M_array_2, M_array_3, M_array_4,
            M_array_5, M_array_6, M_array_7, M_array_8, M_array_9, M_array_10,
            M_array_12, M_array_13 };

            // the time pick is beeing called into this item.
            Time_pick_2 T2 = new Time_pick_2();

            // the if loop making

            // 0
            if (T2.M_build_0() == true)
            {
                int nr_0 = 0;
                for (int i = nr_0; i < nr_0 + 2; i++)
                {
                    M[1][i] = M_array_0[i] + 1;
                }
            }

            // 1
            else if (T2.M_build_1() == true)
            {
                int nr_1 = 1;
                for (int i = nr_1; i < nr_1 + 2; i++)
                {
                    M[1][i] = M_array_1[i] + 1;
                }
            }

            // 2
            else if (T2.M_build_2() == true)
            {
                int nr_2 = 2;
                for (int i = nr_2; i < nr_2 + 2; i++)
                {
                    M[2][i] = M_array_2[i] + 1;

                }
            }

            // etc.



            using (StreamWriter SW = new StreamWriter(@"txt.txt"))
                {
                    // the loops creating the .txt-file.
                    for (int i = 0; i < M.GetLength(0); i++)
                    {
                        for (int a = 0; a < 13; a++)
                        {
                            SW.Write(" " + M[i][a]);
                        }
                        SW.WriteLine(M);
                    }
                }
            }
        }
    }