Speed O/R Mapping with LINQ to SQL: Figure 2: Select the EntityType.
Projects with LINQ to SQL classes use the Data Source Configuration Wizard's Object Data Source rather than the traditional Database Data Source for strongly typed DataSets. Expanding the ProjectName namespace node in the Select the Object to Bind To dialog displays the top-level DataContext object and its EntityTypes as well as forms. The sample projects' BindingSources bind to the NorthwindDataContext's Customer, Customer_Order, and Order_Order_Details EntitySets.