using System;

namespace ConsoleApp1
{
    internal class Program
    {
        public static void Main(string[] args)
        {
            int[,] numbersArray =
            {
                { 1, 2, 3 },
                { 4, 5, 6 },
                { 7, 8, 9 },
            };

            for (int i = 0, j = 2; i < numbersArray.GetLength(0); i++, j--)
            {
                Console.WriteLine(numbersArray[i,j]);
            }
        }
    }
}