jitter.cs

static class Jitter
{
    static readonly Random Random = new Random();

    public static TimeSpan Next(int count, TimeSpan first)
    {
        double jitter;
        lock (Random) jitter = Random.NextDouble(); // Needed to make random threadsafe
        return TimeSpan.FromTicks((long) (first.Ticks * Math.Pow(2, count + jitter)));
    }
}