Coding Conundrums 1.2: Number Shuffle

using System;

class Program
{
    public static void PrintHelp()
    {
        Console.WriteLine("Coding Conundrums Problem 1.2 Solution: Number Shuffle");
        Console.WriteLine("------------------------------------------------------");
        Console.WriteLine("Problem Description:");
        Console.WriteLine("    I want a program that will print outthe numbers 1,2,3,4,5,6,7,8,9 in a");
        Console.WriteLine("    shuffled order. The order must be different each time the program runs. Note");
        Console.WriteLine("    that the same number must be different each time. It should be possible to");
        Console.WriteLine("    extend this to work with 52 numbers, in which case I can make a shuffled");
        Console.WriteLine("    deck of cards.");
        Console.WriteLine();
        Console.WriteLine("Use it like this: ");
        Console.WriteLine("    numbershuffle.exe <count-to>");
        Console.WriteLine();
        Console.WriteLine("Paramters:");
        Console.WriteLine("    <count-to>: The number to count up to when generating the initial sequence of numbers.");
    }

    public static void Main(string[] args)
    {
        if(args.Length != 1)
        {
            PrintHelp();
            return;
        }

        int numberCount;
        if(!int.TryParse(args[0], out numberCount))
        {
            PrintHelp();
            return;
        }



        int[] numbers = new int[numberCount];
        for(int i = 0; i < numberCount; i++)
        {
            numbers[i] = i + 1;
        }

        int swapsCount = numberCount * 2;
        int temp, a, b;
        Random random = new Random();
        for(int i = 0; i < swapsCount; i++)
        {
            a = random.Next(numbers.Length);
            b = random.Next(numbers.Length);

            temp = numbers[a];
            numbers[a] = numbers[b];
            numbers[b] = temp;
        }

        for(int i = 0; i < numbers.Length; i++)
        {
            Console.Write("{0} ", numbers[i]);
        }
    }
}