Ahhh, ok I didn't realize that you're trying to compile in Visual Studio, not Unity.
There is an issue that I've been going back and forth with Unity concerning this. They changed something in the way they build the VS projects. It really should just work, and I don't think there's a lot we can do on our end (but I could be wrong). Hopefully, we can come up with a fix soon. In the meantime, you will need to switch to Unity to compile the project and check for errors (I'm assuming that's the reason you're compiling in VS?)
On the off chance, also double check that you're not using the new Unity scripting back end currently in beta, that can cause problems.