recover deleted files

Question

hello,
I am working on an application that is intended to recover deleted files from the system(both those from recycle Bin and those already emptied from the recycle bin but still understandable). I decided on c# as language, but I have trouble finding classes that deal with this problem. Does anyone know any classes/methods for finding deleted files, retrieving them or any tutorials or helps on the matter. I have little experience on the subject so any help would be strongly appreciated.

Many thanks,
Ryan