ServiceStack.StreamExt.ToMd5Hash C# (CSharp) Method

        public static string ToMd5Hash(this Stream stream)
        {
            var hash = MD5.Create().ComputeHash(stream);
            var sb = StringBuilderCache.Allocate();
            foreach (byte b in hash)
            {
                sb.Append(b.ToString("x2"));
            }
            return StringBuilderCache.ReturnAndFree(sb);
        }