问题
I'm using Visual Studio 2015
I have a Shared Project as an Independent Solution (A collection of Extensions used in several others Solutions).
I want to TEST the Shared Project (Independently any other solution).
So, I add a new TEST Project.
But, in my TEST Project I can't add ANY reference to the Shared Project (No option).
回答1:
You can edit the project's csproj file and at end of imports add an entry like
<Import Project="..\SharedProject\SharedProject.projitems" Label="Shared" />
changing path & SharedProject as appropriate
probably best adding it to another project and copying the row created there (assuming same path depths)
回答2:
Since a shared project can't be compiled on its own it cannot be added as a reference directly to a unit test project.
However, a work-around I've used is to create a helper class library and use that as a reference in the test project. In your case, create a new class library and call it RobHelperTest.Helper. This project won't contain any code on its own, so delete the class1.cs file. Since this is a class library, you can reference shared projects so simply add a reference to all your shared projects to RobHelperTest.Helper and then create a reference to RobHelperTest.Helper in your unit test project RobHelperTest.
Now you have full access to all your objects within the shared projects.
来源：https://stackoverflow.com/questions/32626253/cant-add-shared-project-to-visual-studio-test-project