using System;

using System.Collections.Generic;

​

public class FairRandom {

    private int lastNumber;   // we always need to know the last number generated

                                  // so it's a private field

    private Random rnd;

                                  // we would also like to reuse the same Random object 

    public FairRandom () // This is a custom constructor

    {

        lastNumber = 3;

        rnd = new Random(3);//This is a specific seed I provided

    }

    public int Next() {

        int num;

        if (lastNumber == 6) {

            num = rnd.Next(1,3);

        }

        else if (lastNumber == 1) {

            num = rnd.Next(5,7);

        }

        else {

            num = rnd.Next(1,7); 

        }

        lastNumber = num;

        return num;

    }

​

}

​

public class Program

{

    public static void Main()

    {

        FairRandom frnd = new FairRandom();

        for (int i=0;i<100;i++)

            Console.WriteLine(frnd.Next()); //unable to access rnd in the class FairRandom

    }

}