How do I create a WCF Generic Data Repository Service that contains all my Entities.

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C#

WCF

I need to create a Generic WCF Database Service, being a bit lazy I do not want to create a Service for each Entity.
I need it to work with NetTCP Binding - SO RIA, and Data Services are out.

So How can I handle a Generic Data Repository in a WCF service so that I may easily perform CRUD operations.
My Repositories are generic so I use this with Entity Framework.

GenRepo<PRODUCT> products = new GenRepo<PRODUCT>();
int addedID = products.Add(product);
return products.GetByID(addedID);

So how to do this with WCF Service - whereby I have several entities. I understand there is an issue with Generics in WCF -
My Data Types are shared Client and Server applications. So I can easily write the call on the client with the type in the Generic argument <mypoco>.