Create and Traverse XML using LINQ to XML

http://www.c-sharpcorner.com/UploadFile/dhananjaycoder/creatingsavingxmltreelinq07292009084107AM/creatingsavingxmltreelinq.aspx

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

http://weblogs.asp.net/scottgu/archive/2007/08/07/using-linq-to-xml-and-how-to-build-a-custom-rss-feed-reader-with-it.aspx

http://wiki.asp.net/page.aspx/84/linq-to-xml/