debug c# application

I want to debug a c# application, it's a big application and I can't build it all by myself. I can only build a portion(a DLL) for that. The application installed in my machine is built by others. But after I rebuild the DLL b开发者_开发知识库y myself and replace the DLL currently in my machine, the new DLL can't be loaded. I guess the reason is in the old DLL it has the key of the author so that we can't replace it with my customized one. If it's the case, is there any hackable method to replace the DLL with my own one?

The only way is to bypass strong name verification for a given assembly or globally but be warned that this could pose a HUGE security problem.