以下列出了ASP.NET对XML常用的操作代码包括读，写，删除等，希望对新手有帮助。
user.xml内容如下：
<?xml version="1.0" encoding="GB2312"?>
<UserInfo>
<datarow>
<username>adsfasdfasdfaaaaaa</username>
<password>23451111111</password>
<study>高中</study>
</datarow>
<datarow>
<username>adsfasdfasdf</username>
<password>23451111111</password>
<study>高中</study>
</datarow>
<datarow>
<username>lingyubin222222</username>
<password>520520</password>
<study>大学</study>
</datarow>
<datarow>
<username>lingyubin1232</username>
<password>520520</password>
<study>大学</study>
</datarow>
<datarow>
<username>lingyubin123232</username>
<password>520520</password>
<study>大学</study>
</datarow>
<datarow>
<username>23213</username>
<password>3232332</password>
<study>高中</study>
</datarow>
<datarow>
<username>3423123</username>
<password>3213</password>
<study>小学</study>
</datarow>
</UserInfo>
WebForm.aspx内容：
<%@ Page language="c#" Codebehind="WebForm2.aspx.cs" AutoEventWireup="false" Inherits="StudyTest.新博机试题.WebForm2" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >
<HTML>
<HEAD>
<title>WebForm2</title>
<meta content="Microsoft Visual Studio .NET 7.1" name="GENERATOR">
<meta content="C#" name="CODE_LANGUAGE">
<meta content="JavaScript" name="vs_defaultClientScript">
<meta content="http://schemas.microsoft.com/intellisense/ie5" name="vs_targetSchema">
</HEAD>
<body MS_POSITIONING="GridLayout">
<form id="Form1" method="post" runat="server">
<table cellSpacing="0" cellPadding="0" align="center" border="0">
