How do modify a large XML file to become smaller?

[poker]

I get a larger XML file from an outside source. I would like to read specific elements and write them to a new XML file for my intended user. My user doesn't need the other elements.

I tried this but I don't think I'm navigating the hierarchy correctly.

            XElement xml = XElement.Load("test.xml");
            XElement xml2 = new XElement("applications",
                                    new XElement("application",
                                       new XElement("uid", xml.Element("uid").Value)));
   
            xml2.Save(@"C:\newfile.xml");

Let say the XML looks like this:

<?xml version="1.0" encoding="utf-8"?>
<applications>
<applicant>
<uid>321321321</uid>
<address>321321321</address>
<phone>321321321</phone>
<email>321321321</email>
</applicant>
</applications>

And I just want a file like this in the end:

<?xml version="1.0" encoding="utf-8"?>
<applications>
<applicant>
<uid>321321321</uid>
</applicant>
</applications>

I also know I need a loop in there somewhere.

Any help is appreciated.

Thanks.