ReadHexStringToByte -TizzyT

        static public byte[] ReadHexStringToByte(string Input)
        {
            Input = Input.ToUpper().Trim();
            if (Input.Length == 0) goto fail;
            string ValidChar = "0123456789ABCDEF";
            foreach (char character in Input)
            {
                if (!ValidChar.Contains(character)) goto fail;
            }
            if (Input.Length % 2 == 1) Input = "0" + Input;
            byte[] ResultBytes = new byte[Input.Length / 2];
            int index = 0;
            for (int i = 0; i < Input.Length; i += 2)
            {
                ResultBytes[index] = Convert.ToByte(Input.Substring(i, 2), 16);
                index ++;
            }
            return ResultBytes;
        fail:
            throw new Exception("Invalid HexString");
        }