过率非低位打印字符 webservice中出现的特殊中文字符

 /// <summary>
        /// 过率非低位打印字符
        /// </summary>
        /// <param name="tmp"></param>
        /// <returns></returns>
        public static string ReplaceLowOrderASCIICharacters(string tmp)
        {
            System.Text.StringBuilder info = new System.Text.StringBuilder();
            foreach (char cc in tmp)
            {
                int ss = (int)cc;
                if (((ss >= 0) && (ss <= 8)) || ((ss >= 11) && (ss <= 12)) || ((ss >= 14) && (ss <= 32)))
                    info.AppendFormat("{0:X}", ss);
                else info.Append(cc);
            }
            return info.ToString();
        }