You need to compile code-behind files and other class files into a binary file (assembly file), then drop it inside your sites bin folder (or make it strongly type and drop it in the GAC). *.cs files should not be on the server, only the .dll files.

This is because EPiServer uses the Web Application Project model, and not the Web site project model, where you can just drop the files inside your web sites folder, and they'll get compiled on the fly.

Hope this helps.

Frederik

That explains it. So if I compile in Visual Studio can I just replace the files in the bin-folder with the ones on the server?

Or if to put it this way: I've never worked with web application projects so what is the easiest way to go about if I want to make a small change to the site? In this example only to a couple of the files.

I just saw that you had already answered it. I missed that line...

Thanks! I'll give it a try!