How do I grab the data displayed by the XML in the webpage?

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Crawl down the source code is no data, how else, thank you

与血有关

XmlDocument doc = new XmlDocument ();
ArrayList n = new ArrayList ();
doc.Load (Server.MapPath ("p.xml"));
XmlNode r = doc.DocumentElement;
foreach (XmlNode nn in r.ChildNodes)
 n.Add (nn.FirstChild.Value);