How to merge a test project with my class library project in VisualStudio?

Question

C++ / C#

Good afternoon. I decided to learn C# for myself, but I ran into an unexpected problem - I can't write unit tests, which are very familiar to me.
What I do:
1. Create a C# project for the class library.
2. I create a project for testing.
And I don’t understand how I need to do so that the classes from the first project are visible in the second. Maybe I'm doing something wrong in principle?

Answer 1

1. You select in the Solution explorer in your test References
   If something doesn't work, check the version of the framework in both projects - they must match.