asp.net 操作xml

asp.net 对xml文件的读写,添加,修改,删除操作
下面有代码调试正确

using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using System.Xml;
private XmlDocument xmlDoc;

//load xml file
private void LoadXml()

//添加节点
private void AddElement()

//修改节点
private void UpdateElement()

//删出节点
private void deleteNode()

private void showIt()

Xml的样式:

<?xml version="1.0" encoding="gb2312"?>
<user>
<person>
</person>
<person name="风拉" sex="男" age="25">
<pass>123</pass>
<Address>大明</Address>
</person>
<person name="风云" sex="女" age="25">
<pass>123</pass>
<Address>昆明</Address>
</person>
</user>