I downloaded unity and downloaded the project sample. However anytime I click on a script to open it, visual studio gives me an error telling me the file is not found. it tells me this for every script. even if I create a new script or project. I tried switching the preference back to mono however i am not able to select mono develop as a source.
I dont know the answer to your question, but I remeber i had to do a little config of Visual studio when i installed it.
Look some tutorial to find how. I remember was simple, like 2 minutes.