static void Main(string[] args)
        {
            int[,] array = { { 5, 6, 6, 7, 8 }, { 1, 5, 6, 7, 5 }, { 1, 3, 4, 5, 6 }, { 1, 4, 56, 5, 90 }, };

            for (int i = 0; i < array.GetLength(0); i++)
            {
                for (int j = 0; j < array.GetLength(1); j++)
                {
                    Console.Write(array[i, j] + " ");
                }
                Console.WriteLine();
            }

        }