How to forbid a .NET DLL class library to be referenced

Question

How can I forbid dll class library to be referenced in other solutions?

Answer 1

You can make some dll class methods to fail if it is not used by your own main program.

 Assembly main = System.Reflection.Assembly.GetExecutingAssembly();

 if (main.FullName != .....)
     throw new NotSupportedException();

or

 if (IsSignedWith(main, myCompanysX509Certificate))
     throw new NotSupportedException();