Background: I am working on a project that involves a WinForms app. The client wants to expose a local-only HTTP server to allow other apps to trigger functionality on a running instance of the WinForms app via a REST API (or similar). The preference is to implement the aforementioned API using ASP.NET Core.

My question is thus: How do I structure a project to have both an ASP.NET Core API and a WinForms GUI in the same process? Are there any pitfalls I'd have to be wary of?