VS 2008 - Differentiate And Save 2 Documents Into One XML File

I have 2 xml documents that I need to find the difference and then save it back to an xml file. I already have the code to get the difference, I am just lost on how to save the IEnumerable back to xml. I tried to stuff it into an XDocument, but got a conversion error.

Code:
Dim xDoc As XDocument = XDocument.Load("doc1.xml")
Dim xDoc2 As XDocument = XDocument.Load("doc2.xml")
Dim result = xDoc2.Descendants("Contact").Except(xDoc.Descendants("Contact"))
'Tried this but It blew up.
Dim resultDoc As XDocument = result
resultDoc.Save("result.xml")

Am I going to have to rebult the xml document and manually add the elements? Or does LINQ support converting back to the same schema?