Is programming a File Monitor/Watcher Application(C#) with WF4 possible?

Hey
I need to know if it is possible to develop an application to track file activity for a specified type in a specified folder/directory using WF4 Visual Studio 2010.
Please give me helpful material/links to help me learn and implement this.
A sample application to identify file events and if possible also read the file content should be helpful.

Here are relevant links to this topic -
http://msdn.microsoft.com/en-us/library/ms741707(v=VS.90).aspx

http://social.msdn.microsoft.com/forums/en-US/windowsworkflowfoundation/thread/ffbdf933-0d26-4748-8250-781128fa2e97/

thanks in advance
Codrenalin.