Now that we have learned all of the features related to LINQ and LINQ to Entities, we will use them in the data access layer of a WCF service. We will create a new WCF service very similar to the one we created in the previous chapters, but in this service, we will use LINQ to Entities to connect to the
Northwind database to retrieve and update a product.
In the data access layer, we will use LINQ to Entities to retrieve product information from the database and return it to the business logic layer. You will see that with LINQ to Entities, we will need only one LINQ statement to retrieve the product details from the database in the
GetProduct method and we will no longer need to worry about ...