private static bool ByteArrayToFile(string fileName, byte[] byteArray, int offset)
        {
            try
            {
                if (offset == 0)
                {
                    using (var fs = new FileStream(fileName, FileMode.Create, FileAccess.Write))
                    {
                        fs.Write(byteArray, 0, byteArray.Length);
                        return true;
                    }
                }
                else
                {
                    using (var fs = new FileStream(fileName, FileMode.Append, FileAccess.Write))
                    {
                        Console.WriteLine(offset + " " + byteArray.Length);
                        fs.Write(byteArray, offset, byteArray.Length);
                        return true;
                    }
                }

            }
            catch (Exception ex)
            {
                Console.WriteLine("Exception caught in process: {0}", ex);
                return false;
            }
        }