using System;

public class Program

{

    public static void Main()

    {

        int[,] getal = new int[3, 6];

        string uitvoer = "";

        Random willekeurig = new Random();      

        for (int x = 0; x <= getal.GetUpperBound(0); x++) 

        {

            for (int y = 0; y <= getal.GetUpperBound(1); y++) 

            {

                getal[x, y] = willekeurig.Next(1, 7);

            }

        }

        for (int x = 0; x <= getal.GetUpperBound(0); x++)

        {

            uitvoer += "Reeks " + (x + 1) + ":";

            for (int y = 0; y <= getal.GetUpperBound(1); y++)

            {

                uitvoer += Convert.ToString(getal[x, y]).PadLeft(10);

            }

            uitvoer += Environment.NewLine;

        }

​

        Console.WriteLine(uitvoer);

    }

}