var finalSecret = serverSeed + clientSeed;

                var bytes = GetSha256Bytes(finalSecret);

                var hash = StringHelpers.ByteToString(bytes);
                var mersenneTwisterSeed = Convert.ToUInt32(hash.Substring(hash.Length - 8, 8), 16);

                var mersenneTwister = new MersenneTwister(mersenneTwisterSeed);

                _finalShuffle = InitialShuffle.Shuffle(mersenneTwister).ToList();

/////////////////
public static class Shuffler
    {
        public static IEnumerable<T> Shuffle<T>(this IEnumerable<T> source, Random randomNumberGenerator)
        {
            var elements = source.ToArray();
            for (var i = elements.Length - 1; i >= 0; i--)
            {
                // Swap element "i" with a random earlier element it (or itself)
                // ... except we don't really need to swap it fully, as we can
                // return it immediately, and afterwards it's irrelevant.
                var swapIndex = randomNumberGenerator.Next(i + 1);
                yield return elements[swapIndex];
                elements[swapIndex] = elements[i];
            }
        }
    }