Shuffling a collection using generics and an extension method

I made a small application to get images from Flickr and wanted to display this in a website in random order. I found this little snippet of code, which shuffles any collection (using generics) into a random collection.

It’s an extension method that extends any collection with a Shuffle method. I just love those extension methods and use them a lot!

public static class Extensions
{
    public static void Shuffle<T>(this IList<T> list)
    {
        Random rng = new Random();
        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;
        }
    }
}

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