Q:

what is the difference between a WPF app to a winforms app?

Possible Duplicate:
WPF versus Winforms 

I have been using visual C# for a while now, I have made some apps in the window forms but never really explored the WPF apps. Based on what I have discovered it pretty much is the same as a winforms just in a different type of environment and the XML. So why is there such a WPF app? what makes it different form a winform and what is it mainly used for?

A:

There are many reasons to move WPF. You will be able to find many reasons by simple google search. It's the new trend and when it comes to Windows application development the technology has been focusing to WPF rather than Winforms.
As Tom also has mentioned above this thread gives you many points. 
My opinion is there is no big reasons not to go for a WPF if somebody is going to develop a windows application from the scratch. 

