want to move all business logic to BLL layer, but need to pass in formcollection, is that clean?...

Interfaces and Coupling...

Loose coupling : Can we use Interfaces when we need cloneables params?...

Which side of the api chasm?...

DDD: What are good reasons for you to loosely-couple Entities?...

Any suitable patterns for this problem?...

Are there other benefits to loosely coupled code besides TDD?...

Do you define an interface for every public class in your domain model? Pros and Cons?...