Why can't strongly named assemblies use assemblies that aren't signed?

Question

To sign an assembly A you have to make sure all assemblies B, C, D that are used by A are signed, and then all assemblies that are used by B, C, D, and so on. I don\'t under

Answer 1

The point is that otherwise you could replace assembly B/C/D with a different (hacked) one, and A would never notice; it would load them and execute the code. With strong naming, you can't do this without either re-signing the hacked B/C/D with the same key, or by hacking A.