using System;

using System.Collections;

​

public class Program

{

    public static void Main()

    {

        int[,] array2D = new int[,] { { 1, 2 }, { 3, 4 }, { 5, 6 }, { 7, 8 } };

        Console.WriteLine(array2D[0,0]);

        foreach (int i in array2D){

          Console.WriteLine(i);

        }

    }

}

​