If you already have a database schema defined, you can use it to quickly create LINQ to SQL entity classes modeled off of it.

The easiest way to accomplish this is to open up a database in the Server Explorer within Visual Studio, select the Tables and Views you want to model in it, and drag/drop them onto the LINQ to SQL designer surface:

Figure 4

When you add the above 2 tables (Categories and Products) and 1 view (Invoices) from the "Northwind" database onto the LINQ to SQL designer surface, you'll automatically have the following three entity classes created for you based on the database schema:

Figure 5

Using the data model classes defined above, I can now run all of the code samples (expect the SPROC one) described in Part 1 of this LINQ to SQL series.  I don't need to add any additional code or configuration in order to enable these query, insert, update, delete, and server-side paging scenarios.