ASP NET Core shared library between API / WebApp

I've got 2 projects in my solution now, one being an MVC API, the other being an MVC WebApp. Both of them use things like repositories, same-ish controllers, entities, etc....

Could I create a .NET Core class where I can define a generic controller for both of them to use? I've been able to separate the generic repository into the library already.

ASP NET Core shared library between API / WebApp Click here