ASP.NET service vs repository layers

Question

What is the difference between a service layer and a repository? I have worked through a lot of demo ASP.NET MVC apps and most of them have just repositories. And some have a

Answer 1

A repository typically handles data-access only. A service layer will use a repository, and apply any additional business logic. Think of the repository as a re-usable layer than could be used by anything that wants to access your data. Different apps might have different business rules (that would go in the service layer), but could all use the same repository layer implmentation