Retrieving lost files

Hi,

I don't know how it's happened, but I've lost all my sources files for a project I've been working on.
I have a folder for my VS source files, from which I usually run any project. If I decide to try to modify one, I copy it from that folder, paste it into another folder which I use for that purpose, and modify it from there, in this way I figure I can still run the unmodified app. while I'm working on the modification.
When I'm happy with the re-worked project I replace the whole project back into the source files folder and delete the one in the other folder.

I've just done that, but now I've thought of another little mod to make but I find that I only have the Project Name file, bin and Debug folders, everything else has gone.
I don't know how that's happened, everything in the recycle bin is already deleted.

Is there the slightest chance I could get it all back ?
Or do I have to start from scratch again ?


Poppa