C#: Signing DLL with strong name (what about its dependencies?)

问题

A while ago I asked about "DLL caused an exception" when calling a method that references another DLL. On that time I had no clues but now I think what may be causing the problem.

Assume I have an EXE calling a DLL1 which requires a DLL2. When I signed DLL1 with a strong name, for some reason all calls to DLL2's methods started returning the error below:

System.Exception: Error while trying to call method X from DLL1.
---> System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation.
---> System.IO.FileLoadException: Could not load file or assembly 'DLL2', Version=2.1.5899, PublicKeyToken=null' or one of its dependencies. A strongly-named assembly is required.

Does this mean I have to strongly name every DLL along the dependency chain?

I had to sign the first DLL because otherwise I would get a warning during regasm.

回答1:

Yes

a signed assembly cannot call an unsigned assembly. That's part of the trust chain and it does indeed mean you will have to sign all dependencies of your signed assembly.

来源：https://stackoverflow.com/questions/35631136/c-signing-dll-with-strong-name-what-about-its-dependencies