xml删除不了！
[code=C#]

tongyong.xml
<TongYong>

<Ty>
<name> 三 </name>
<title> san </title>
<value> 100000 </value>
</Ty>
<Ty>
<name> 四 </name>
<title> dddd </title>
<value> 100000ddd </value>
</Ty>
</TongYong>

.cs
protected void rptXML_ItemCommand(object source, RepeaterCommandEventArgs e)
{
if (e.CommandName == "delete ")
{
XmlDocument doc = new XmlDocument();
doc.Load(Server.MapPath( "~/App_Data/tongyong.xml "));

XmlNode root = doc.SelectSingleNode( "/TongYong ");


XmlNode toDelete = doc.SelectSingleNode( "/TongYong/Ty/title[ 'dddd '] ");

root.RemoveChild(toDelete.ParentNode);
doc.Save(Server.MapPath( "~/App_Data/tongyong.xml "));
}
}

[/code]

[解决办法]
XmlNode toDelete = doc.SelectSingleNode("/TongYong/Ty/title['dddd']");

root.RemoveChild(toDelete.ParentNode);
=>

XmlNode toDelete = doc.SelectSingleNode("/TongYong/Ty[title='dddd']");


toDelete.ParentNode.RemoveChild(toDelete);