Making a program that ask the user 5 questions in random without duplicate the questions
<blockquote>
  <p><strong>Possible Duplicate:</strong><br>
  <a href="http://stackoverflow.com/questions/273313/randomize-a-listt-in-c-sharp">Randomize a List&lt;T&gt; in C#</a>  </p>
</blockquote>



<p>I want to make a program that ask the user 5 questions in random without duplicate the questions, and if the question is right go through the next question if wrong stop until he gave the right answer, and this is the code which I had written, but there are still some problems, like there are duplicate and when the user enter the wrong answer it only stop for one time, and then the program closed!
now how can I prevent duplicate the same question, and if he enter wrong value don't proceed to the next question or the program closed?</p>

<pre><code>static void Main()
{
    next:
    Random question = new Random();
    int x = question.Next(5);
    string[] array = new string[5];
    array[0] = "-What is the capital of France";
    array[1] = "-What is the capital of Spain";
    array[2] = "-What is the captial of Russia";
    array[3] = "-What is the capital of Ukraine";
    array[4] = "-What is the capital of Egypt";

    Console.WriteLine(array[x]);

    string[] answer = new string[5];
    answer[0] = "Paris";
    answer[1] = "Madrid";
    answer[2] = "Moscow";
    answer[3] = "Kiev";
    answer[4] = "Cairo";

    string a = Console.ReadLine();

    if (a == answer[x])
    {
        Console.WriteLine("It's True \n*Next Question is:");
        goto next;
    }
    else
        Console.WriteLine("It's False \n*Please Try Again.");

    Console.ReadLine();
}
</code></pre>
