>Hi all, I have a WCF service which I'm using to retrieve data from a SQL database, the service uses classes which are in a separate assembly (my data access layer ), however in my client app which is an MVC app my controller methods need access to these classes as they are written to receive them as parameters ( for create edit etc...) how can I expose these classes in my service so that I don't need to reference the DAL assembly in my client ( which sort of defeats the object ), I hope this makes sense ?

If the service is in a Visual Studio project/solution, can't you just add a reference to the assembly?