Get a list of all registered objects implementing a certain interface

Question

Consider the following

builder.Register(c => new A());
builder.Register(c => new B());
builder.Register(c => new C());

B

Answer 1

I was looking for a similar solution for registrations done as follows:

builder.RegisterType().As();
// and/or
builder.RegisterType().Keyed(key);

where IExoticTree and IMountainTree inherit from a common ITree interface.

With those, the service type (e.g. registered interface) is different from the LimitType and hence, the proposed solution is not applicable.

I got inspired by the accepted solution to manage these as well with the following code:

IEnumerable instances = scope.ComponentRegistry.Registrations
                                                      .Where(r => typeof(ITree).IsAssignableFrom(r.Activator.LimitType))
                                                      .Select(r => r.Services.First())
                                                      .Select(s => scope.ResolveService(s) as ITree)
                                                      .Distinct();

Hope it helps someone ^^