Ioc/DI - Why do I have to reference all layers/assemblies in application's entry point?

Question

(Related to this question, EF4: Why does proxy creation have to be enabled when lazy loading is enabled?).

I\'m new to DI, so bear with me. I understand that the con

Answer 1

• There is a dependency : if an object instantiate another object.
• There is no dependency : if an object expects an abstraction (contructor injection, method injection ...)
• Assembly References (referencing dll, webservices..) are independant from the dependency concept, because to resolve an abstraction and be able to compile the code, the layer must reference it.