How to programmatically verify an assembly is signed with a specific Certificate?

Question

My scenario is we have one program (exe) that will start other programs if found in a particular folder. I want to ensure it only ever starts programs which are signed with our

Answer 1

I believe there is a way to use strong name for the purpose of "Trust". I understand Microsoft only recommends strong name to ensure assembly contents have not been modified and suggests using "Authenticode" for trust.

But if the loader application (the application which loads these assemblies/programs) maintains an Encrypted list of "Assemblies" which it can load; wouldn't that solve the "Trust" problem?

For example, the package loader can maintain assembly name with public keys and loads the assembly/program via full assembly name?