How to bypass a class and look for the dll file instead

[maksins]

Hi!
I am adding my own classes to an existing opensource software (OpenSees). The executable file OpenSees.exe already contains previous version of my class. Is it possible when running OpenSees.exe to look for the .DLL file of my current class in a folder, instead of using the old class inbuilt in it?

[Duthomhas]

Are you asking to make sure your program loads the correct of several possible DLLs?

Google "side-by-side assemblies".