My SharePoint 2010 solution has two projects, one responsible for the back end (WCF web service) and one for the front end (webparts). I added the DLL from the back end to GAC via Visual Studio Command Prompt, should I do the same for the front end DLL?
It is in the .wsp solution file, but when I deploy and attempt to add a web part, it gives me an error:
A web part or web form control on this page cannot be displayed or imported. the type could not be found or a web part is not registered as safe.
While I am investigating the latter, I think the former is the actual problem.