How to use a controller in another assembly in ASP.NET Core MVC 2.0?

Question

For the sake of modularity, I have created some controllers in different assemblies. Each assembly represents a bounded context (a module, a sub-system, a division, etc.) of

Answer 1

I'm trying to resolve the controllers while migrating legacy unit tests from .NET Framework to aspnet core 3.1, this is the only way I got it working:

var startupAssembly = typeof(Startup).Assembly;

var services = new ServiceCollection();

// Add services
...

// Add Controllers
services
    .AddControllers()
    .AddApplicationPart(startupAssembly)
    .AddControllersAsServices();

If I change the order of the three last lines it does not work.

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Avoid doing this for unit testing unless you really have to, i.e. for legacy reasons. If you are not working with legacy code you are probably looking for integration tests.