汉字与unicode码相互转化

 /// <summary>
        /// 将汉字转换为Unicode
        /// </summary>
        /// <param name="strGB">要转换的字符串</param>
        /// <returns></returns>
        public static string GBToUnicode(string strGB)
        {
            byte[] bytes = System.Text.Encoding.Unicode.GetBytes(strGB);
            string lowCode = "", tmpChar = "";

            for (int i = 0; i < bytes.Length; i++)
            {
                if (i % 2 == 0)
                {
                    tmpChar = System.Convert.ToString(bytes[i], 16);//取出元素4编码内容（两位16进制）
                    if (tmpChar.Length < 2) 
                        tmpChar = "0" + tmpChar;
                }
                else
                {
                    string mytemp = Convert.ToString(bytes[i], 16);
                    if (mytemp.Length < 2) 
                        mytemp = "0" + mytemp; 
                    lowCode = lowCode + @"\u" + mytemp + tmpChar;//取出元素4编码内容（两位16进制）
                }
            }
            return lowCode;
        }

        /// <summary>
        /// 将Unicode转换为汉字
        /// </summary>
        /// <param name="name">要转换的字符串</param>
        /// <returns></returns>
        public string UnicodeToGB(string text)
        {

            MatchCollection mc = Regex.Matches(text, "([\\w]+)|(\\\\u([\\w]{4}))");
            if (mc != null && mc.Count > 0)
            {
                StringBuilder sb = new StringBuilder();
                foreach (Match m2 in mc)
                {
                    string v = m2.Value;
                    string word = v.Substring(2);
                    byte[] codes = new byte[2];
                    int code = Convert.ToInt32(word.Substring(0, 2), 16);
                    int code2 = Convert.ToInt32(word.Substring(2), 16);
                    codes[0] = (byte)code2;
                    codes[1] = (byte)code;
                    sb.Append(Encoding.Unicode.GetString(codes));
                }
                return sb.ToString();
            }
            else
            {
                return text;
            }
        }