I have moved some functionality in my vb.net (vs2015) desktop app that I would like to be able to change dynamically to a dll created in a different project. The idea is to be able to distribute a new dll to users to upgrade functionality, kind of a patch (but aimed at customizing rather than updating).

Experimenting, since the application directory is read only, I have registered the dll in a folder of my choosing (by adding reference from my main project) and created an interface to replace the dll at runtime from within my app. This works fine. To actually make it work I now need to be able to have my setup project copy the dll to some location (preferably a folder in C:\Users\Public where I am already placing a database used by the app) from where my app will find it. How would I go about that?

Sorry for not presenting a lot of info about what I have already tried. I attempted to simply put the dll in the same file system folder in the setup project where the database is copied from. That didnt work and it broke all my dependencies. I now have to rebuild the setup project from scratch and I thought I would ask before I wreck everything again.