Sample code for converting TFS work item to XML?

[حسايف]

I want to write a simple program to query TFS and convert all of the work items to a uniform type XML file and save them to separate files in a folder.I'm sure this kind of work is commonly enough done, and is very simple - but I can find no samples on the Internet and no way of connecting to TFS programmatically and retrieving only work item info. Would anyone be able to help me out ?Thanks very much