原贴: http://topic.csdn.net/u/20100414/11/c69748ac-e0b2-490f-bde9-7c5284c3660c.html?seed=1832202493
declare @xml xml=
'<upd:Update xmlns:lar="http://schemas.microsoft.com/msus/2002/12/LogicalApplicabilityRules" xmlns:cmd="http://schemas.microsoft.com/msus/2002/12/UpdateHandlers/CommandLineInstallation" xmlns:bar="http://schemas.microsoft.com/msus/2002/12/BaseApplicabilityRules" xmlns:upd="http://schemas.microsoft.com/msus/2002/12/Update">
<upd:UpdateIdentity UpdateID="9f79459a-d72e-49fc-acb0-1adbb2e63686" RevisionNumber="103"/>
<upd:Properties DefaultPropertiesLanguage="en" UpdateType="Software" Handler="http://schemas.microsoft.com/msus/2002/12/UpdateHandlers/CommandLineInstallation" PublicationState="Published" CreationDate="2005-04-26T08:21:13.989Z" PublisherID="395392a0-19c0-48b7-a927-f7c15066d905" MaxDownloadSize="3320008" MinDownloadSize="0">
<upd:InstallationBehavior RebootBehavior="CanRequestReboot"/>
<upd:Language>zh-cn</upd:Language>
</upd:Properties>
<upd:LocalizedPropertiesCollection>
<upd:LocalizedProperties>
<upd:Language>en</upd:Language>
<upd:Title>Critical Update for SQL Server 2000 Desktop Engine (Windows) on Windows Server 2003 (KB829358)</upd:Title>
</upd:LocalizedProperties>
</upd:LocalizedPropertiesCollection>
<upd:Relationships>
<upd:Prerequisites>
<upd:UpdateIdentity UpdateID="30b6a809-9ba3-4c0f
XML在我们的程序中用到的越来越多，因为它存储、读取、修改都比较方便。
下面我来分享一下XML的常用操作(增删改查)，下面是程序运行效果：
增(增加节点包括创建XML):
/// <summary>
/// 创建XML文档
/// </summary>
/// <param name="path"></param>
......
