If that doesn't produce anything of value, or just flat out doesn't work, then your XML probably needs to be parsed with the XML DOM, which I haven't really used and so don't know all that much about. But, should be relatively easy to find info on the XmlDocument class (in the System.Xml namespace). In fact, here's a link to get you started:

http://msdn.microsoft.com/en-us/library/system.xml.xmldocument.aspx


Or, possibly, you could use LINQ to XML. I've only used it a handful of times, but it can work nicely.