排除有可能出错的打印字符

  private string ReplaceNotTypeStr(string str)
  {
   //排除有可能出错的字符
   Regex rex = new Regex("[^\u0021-\u007e^\u4e00-\u9fa5^\uFF00-\uFFFF^\u3001-\u3002^\u3008-\u300b^\u201c-\u201d^\u2018-\u2019^\u2026^\u2014^\u00b7]");
   str = rex.Replace(str," ");
   return str;
  }