How do I allow assembly (unit testing one) to access internal properties of another assembly?

Question

I would like my Core assembly to not expose a certain class and I would still like to be able to test it. How can I do that ?

Answer 1

InternalsVisibleTo attribute to the rescue!

Just add:

[assembly:InternalsVisibleToAttribute("UnitTestAssemblyName")]

to your Core classes AssemblyInfo.cs file

See Friend Assemblies (C# Programming Guide) for best practices.