Cant link third party dll (c# .netframework)

Hello, everyone! Any help really needed!
I need to work from UE4 with a code written in c#.

I created a c++/clr wrapper for c# code. I tested it on a native console c ++ application, everything works. But it doesn’t work to connect wrapper to ue4. Working with clr wrapper succeeds, but when trying to access classes from c # dll, the application crashes with an exception.

Any examples would be beneficial or someone can suggest the correct algorithm for solving such a problem.