An extension method on IEnumerable needed for shuffling [duplicate]

Answer 1

With some LINQ love:

public static IEnumerable Shuffle(this IEnumerable list, int size)
{
    var r = new Random();
    var shuffledList = 
        list.
            Select(x => new { Number = r.Next(), Item = x }).
            OrderBy(x => x.Number).
            Select(x => x.Item).
            Take(size); // Assume first @size items is fine

    return shuffledList.ToList();
}