Coding 4 fun
A few people here at Microsoft created a website for those who write code for fun. Check it out, it has articles on various topics ranging from cool utilities to web development to game development. And they have a nice column on xml.
Coding for fun: https://msdn.microsoft.com/coding4fun/
XML for fun: https://msdn.microsoft.com/coding4fun/xmlforfun/
Stan Kitsis