Question

Using Castle Windsor I can register multiple implementations of a type e.g.

container.Register(Component.For<IMyInterceptor>()
    .ImplementedBy<MyInterceptor>();

container.Register(Component.For<IMyInterceptor>()
    .ImplementedBy<MyInterceptor2>();

This all works as you’d expect and I can resolve multiple implementations using ResolveAll()

If I try to register an instance of another implementation at runtime though – e.g.

var interceptor = new MyInterceptor3();
Container.Register(
    Component.For<IMyInterceptor>()
        .Instance(interceptor));

I get an exception:

There is a component already registered for the given key MyInterceptor3

Is this the expected behaviour? What I’m trying to acheive is to use e.g. Container.ResolveAll() to get a list of default implementations of IMyInterceptor plus optional additional implementations (i.e. on a request by request basis, when debug modes are enabled).

Answer 1

This will sort you out.

var interceptor = new MyInterceptor3();
Container.Register(
    Component.For<IMyInterceptor>()
        .Instance(interceptor).Named("something unique));

Names must be unique.