Remove single controller from `ConfigureApplicationPartManager` in ASP.NET Core

I'm aware that _mvcBuilder.ConfigureApplicationPartManager allows me to remove complete assemblies from the AppParts (remove all controllers of one assembly). But is there a possibility to remove only a single controller?

I'd like to be able to control what ASP.NET Core MVC controllers of my library are available via settings.

You can selectively remove individual controllers in ASP.NET Core by customizing the IApplicationFeatureProvider:

public class CustomControllerFeatureProvider : IApplicationFeatureProvider<ControllerFeature>
{
    private readonly HashSet<Type> _excludedControllers;

    public CustomControllerFeatureProvider(IEnumerable<Type> excludedControllers)
    {
        _excludedControllers = new HashSet<Type>(excludedControllers);
    }

    public void PopulateFeature(IEnumerable<ApplicationPart> parts, ControllerFeature feature)
    {
        // Remove controllers that match the types in _excludedControllers
        feature.Controllers
            .Where(controller => _excludedControllers.Contains(controller.AsType()))
            .ToList()
            .ForEach(controller => feature.Controllers.Remove(controller));
    }
}

In Program.cs, configure the ApplicationPartManager to use your custom feature provider:

var builder = WebApplication.CreateBuilder(args);

// Assume we have a setting that tells us which controllers to exclude
var excludedControllers = new List<Type>
{
            typeof(YourNamespace.Controllers.YourController) // Specify the controller type to exclude
        };

builder.Services.AddControllersWithViews().ConfigureApplicationPartManager(partManager =>
{
    partManager.FeatureProviders.Add(new CustomControllerFeatureProvider(excludedControllers));
});