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();         }