C#如何將十六進制數字符串轉byte[]？

代碼：

        /// <summary>
        /// 16進制原碼字符串轉字節數組
        /// </summary>
        /// <param name="hexString">"AABBCC"或"AA BB CC"格式的字符串</param>
        /// <returns></returns>
        public static byte[] ConvertHexStringToBytes(string hexString)
        {
            hexString = hexString.Replace(" ", "");
            if (hexString.Length % 2 != 0)
            {
                throw new ArgumentException("參數長度不正確");
            }

            byte[] returnBytes = new byte[hexString.Length / 2];
            for (int i = 0; i < returnBytes.Length; i++)
            {
                returnBytes[i] = Convert.ToByte(hexString.Substring(i * 2, 2), 16);
            }

            return returnBytes;
        }