[Kekke]

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace rand
{
    class Program
    {
        static Random random = new Random();

        static void Main(string[] args)
        {
            PrintRandomNumbers(5);
            Console.Read();
        }

        static void PrintRandomNumbers(int iRandomNo)
        {
            for (int i = 0; i < iRandomNo; i++)
            {
                Console.Write(random.Next(iRandomNo));
            }
        }
    }
}

Slumpar iRandomNo tal från 0-iRandomNo