请问这种xml要怎么取数据 - .NET技术 / C#

XML code:

<DATA>
<USERS>
<USER ID="book" STIP="vir" />
<USER ID="shop" STIP="vir" />
<USER ID="DELL" STIP="vir" />
</USERS>
</DATA>



取三个USER的 ID和STIP的值.应该怎么取呢

C# code:

XmlDocument xmlDocument;
xmlDocument = new XmlDocument();

xmlDocument.LoadXml(configRst);
XmlNodeList nodelist = xmlDocument.SelectNodes("/DATA/USERS");
string airs = nodelist.Count.ToString();
foreach (XmlElement node in nodelist)
{
string user = node["USER"].InnerText;
Response.Write(user);
}


这样好象取不到.请问才能取到呢

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C# code:

string xml = @"<DATA>
<USERS>
<USER ID=""book"" STIP=""vir"" />
<USER ID=""shop"" STIP=""vir"" />
<USER ID=""DELL"" STIP=""vir"" />