c# xml²Ù×÷

ÒÑÖªÓÐÒ»¸öXMLÎļþ£¨bookstore.xml£©ÈçÏ£º
<?xml version="1.0" encoding="gb2312"?>
<bookstore>
  <book genre="fantasy" ISBN="2-3631-4">
    <title>Oberon's Legacy</title>
    <author>Corets, Eva</author>
    <price>5.95</price>
  </book>
</bookstore>
 
  1¡¢Íù<bookstore>½ÚµãÖвåÈëÒ»¸ö<book>½Úµã£º
   XmlDocument xmlDoc=new XmlDocument();
   xmlDoc.Load("bookstore.xml");
   XmlNode root=xmlDoc.SelectSingleNode("bookstore");//²éÕÒ<bookstore>
   XmlElement xe1=xmlDoc.CreateElement("book");//´´½¨Ò»¸ö<book>½Úµã
   xe1.SetAttribute("genre","ÀîÔÞºì");//ÉèÖøýڵãgenreÊôÐÔ
   xe1.SetAttribute("ISBN","2-3631-4");//ÉèÖøýڵãISBNÊôÐÔ
 
   XmlElement xesub1=xmlDoc.CreateElement("title");
   xesub1.InnerText="CS´ÓÈëÃŵ½¾«Í¨";//ÉèÖÃÎı¾½Úµã
   xe1.AppendChild(xesub1);//Ìí¼Óµ½<book>½ÚµãÖÐ
   XmlElement xesub2=xmlDoc.CreateElement("author");
   xesub2.InnerText="ºò½Ý";
   xe1.AppendChild(xesub2);
   XmlElement xesub3=xmlDoc.CreateElement("price");
   xesub3.InnerText="58.3";
   xe1.AppendChild(xesub3);
 
   root.AppendChild(xe1);//Ìí¼Óµ½<bookstore>½ÚµãÖÐ
   xmlDoc.Save("bookstore.xml");
  //================
  ½á¹ûΪ£º
<?xml version="1.0" encoding="gb2312"?>
<bookstore>
  <book genre="fantasy" ISBN="2-3631-4">
    <title>Oberon's Legacy</title>
    <author>Corets, Eva</author>
    <price>5.95</price>
  </book>
  <book genre="ÀîÔÞºì" ISBN="2-3631-4">
    <title>CS´ÓÈëÃŵ½¾«Í¨</title>
    <author>ºò½Ý</author>
 &n