.net安全防止写不规范字付

输入时
public string TransString(string str)
  {
   short temp=13;
   str=str.Replace("'","’");
   str=str.Replace("&","&");
   str=str.Replace("<","&lt;");
   str=str.Replace(">","&gt;");
   str=str.Replace(" ","&nbsp;");
   str=str.Replace(((char)temp).ToString(),"<br>");
   return str;
  }
读取时.
  public string BackTransString(string str)
  {
   short temp=13;
   str=str.Replace("’","'");
   str=str.Replace("&amp;","&");
   str=str.Replace("&lt;","<");
   str=str.Replace("&gt;",">");
   str=str.Replace("&nbsp;"," ");
   str=str.Replace("<br>",((char)temp).ToString());
   return str;
  }