c# 十六进制转ASCII

 public  string HexStringToASCII(string hexstring)
        {
            byte[] bt = strToToHexByte(hexstring);
            string lin = "";
            for (int i = 0; i < bt.Length; i++)
            {
                lin = lin + bt[i] + " ";
            }


            string[] ss = lin.Trim().Split(new char[] { ' ' });
            char[] c = new char[ss.Length];
            int a;
            for (int i = 0; i < c.Length; i++)
            {
                a = Convert.ToInt32(ss[i]);
                c[i] = Convert.ToChar(a);
            }

            string b = new string(c);
            return b;
        }
        public byte[] strToToHexByte(String hexString)
        {
            hexString = hexString.Replace(" ", "");

            if ((hexString.Length % 2) != 0)

                hexString += " ";

            byte[] returnBytes = new byte[hexString.Length / 2];

            for (int i = 0; i < returnBytes.Length; i++)

                returnBytes[i] = Convert.ToByte(hexString.Substring(i * 2, 2).Trim(), 16); return returnBytes;
        }

方便自己使用，记录一下