Next you discover how Visual Studio 2008’s primary domain-specific LINQ implementation—LINQ to SQL—persists collections of business objects in SQL Server 200x Tables. You dig into the details of creating an object-oriented data access layer (DAL) with LINQ to SQL’s graphical object/relational mapping (O/RM) tool. You see how to automatically generate entity classes by dragging table nodes from a Server Explorer connection to the O/R Mapper’s and discover how associations between entities called EntityRefs and EntitySets correspond to n:1 and 1:n relationships. You also learn how to use the DAL to bind UI controls on data-driven Web pages with ASP.NET’s new LinqDataSource control that substitutes for the ObjectDataSource control. Complete C# 3.0 and Visual Basic 9.0 project code for the LINQ2SQL2ASP.sln project is available for downloading.

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