using System;

​

public class Program

{

    public static void Main()

    {

        string display = string.Empty;

        int[, ] intArray = {{1, 2}, {3, 4}, {5, 6}};

        for (int row = 0; row < intArray.GetLength(0); row++)

        {

            for (int column = 0; column < intArray.GetLength(1); column++)

            {

                //Console.WriteLine(intArray[row, column]);

                // OR

                display += intArray[row, column] + " ";

            }

​

            display += "\n";

        }

​

        Console.WriteLine(display);

    }

}