I get this with the listed software. It doesn't recognize object types and I can't use reference-finding. I have the Omnisharp plugin installed and updated. Just wondering if this is supposed to work properly yet. I'm opening it with Assets->Open Project In Code.
In the .csproj file, there's this:
<Reference Include="UnityEngine"> <HintPath>/Applications/Unity 5.5.0f3/Unity.app/Contents/Managed/UnityEngine.dll</HintPath> </Reference>
Note the space in the file path. Changing Unity's location to
then deleting the generated
.csproj files fixed it.