Create the Data Access tier and Data tier projects: Create a class library project for the Data tier. Add a new class library project the project created in Step 1 for the data access tier. Add a typed DataSet using a new data source that connects to the Northwind sample database. Select the database objects (customers, orders, order details, products, categories, and suppliers) tables. Make sure the TableAdapters are stored in the Data Access tier and the DataSet class is added to the Data tier. Make sure that separate tiers are created for each layer by verifying that separate class libraries were created and the necessary references to the project were added.