Is there any way to tell if an entity has any relationships in EF4?

Using Entity Framework 4, is there any way to tell if an entity has any relationships associated with it? Suppose Object A contains a list of Object B, being tracked by EF. I remove one Object B from the list. During SaveChanges, I want to find the Object B that was removed and no longer has a relationship to Objec开发者_运维知识库t A so I can delete it.

Any way to accomplish this?