You work as an application developer at Contoso.com. You use Microsoft .NET Framework 3.5 and Microsoft ADO.NET to develop an application that will connect to the Microsoft SQL Server 2005 database. You have written the following code to generate a storage schema definition for a stored procedure from the database. You application uses two namespaces named ContosoModel.Store and ContosoModel. The  ContosoModel.Store has the storage schema and the ContosoModel has the conceptual schema that has an entity named Supplier. You want to create a function named GetSuppliersInRegion that returns a list of Supplier entity instances.   What should you do？（）