c#Unicode符号化

/// <summary>

        ///  Unicode 

        /// </summary>

        /// <param name="str"> </param>

        /// <returns>Unicode </returns>

        public static string ToUnicode(string str)

        {

            byte[] bts = Encoding.Unicode.GetBytes(str);

            string r = "";

            for (int i = 0; i < bts.Length; i += 2) r += "\\u" + bts[i + 1].ToString("x").PadLeft(2, '0') + bts[i].ToString("x").PadLeft(2, '0');

            return r;

        }

        /// <summary>

        ///  Unicode 

        /// </summary>

        /// <param name="str">Unicode </param>

        /// <returns> </returns>

        public static string ToGB2312(string str)

        {

            string r = "";

            MatchCollection mc = Regex.Matches(str, @"\\u([\w]{2})([\w]{2})", RegexOptions.Compiled | RegexOptions.IgnoreCase);

            byte[] bts = new byte[2];

            foreach (Match m in mc)

            {

                bts[0] = (byte)int.Parse(m.Groups[2].Value, NumberStyles.HexNumber);

                bts[1] = (byte)int.Parse(m.Groups[1].Value, NumberStyles.HexNumber);

                r += Encoding.Unicode.GetString(bts);

            }

            return r;

        }