using System;

using System.Collections.Generic;

using System.Linq;

​

public static class Program

{

    private static Random rng = new Random();  

​

    public static void Shuffle<T>(this IList<T> list)  

    {  

        int n = list.Count;  

        while (n > 1)

        {  

            n--;  

            int k = rng.Next(n + 1);  

            T value = list[k];  

            list[k] = list[n];  

            list[n] = value;  

        }  

    }

​

    public static void Main(string[] args)

    {

        var quizz = new Dictionary<string, string>

        {

            { "What is the answer to the Ultimate Question of Life, the Universe, and Everything ?", "42" },

            { "What is your name ?", "Sir Arthur, king of the Britons" },

            { "What is your quest ?", "To seek the Holy Grail" },

            { "What is the air-speed velocity of an unladen swallow?", "What do you mean ? An African or European swallow ?" }

        };

        var questions = quizz.Keys.ToList();

        questions.Shuffle();

        foreach (var question in questions)

        {

            Console.WriteLine(question);

            if (Console.ReadLine() != quizz[question])

            {

                Console.WriteLine("You failed");

                Console.ReadLine();

                break;

            }

            else

            {

                Console.WriteLine("Nice !");

            }

        }

    }

}