c# - DTOs vs Serializing Persisted Entities

Question

I'm curious to know what the community feels on this subject. I've recently come into the question with a NHibernate/WCF scenario(entities persisted at the service layer) and realized I may be going the wrong direction here.

My question is plainly, when using a persistent object graph(NHibernate, LINQ to SQL, etc) behind a web service(WCF in this scenario), do you prefer to send those entities over the wire? Or would you create a set of lighter DTO's(sans cyclic references) across?

Answer 1

DTOs. Use AutoMapper for object-to-object mapping