Programming Microsoft® ASP.NET 3.5

Working with SQL Server

Linq-to-SQL brings LINQ query capabilities to SQL Server databases and translates your queries into T-SQL queries. The standard ADO.NET provider—System.Data.SqlClient—then takes care of executing the query. Results are returned via a data reader and, finally, loaded into an IQueryable collection of entity objects. The "entity objects" are the key element. They form a data model based on the database schema through which you operate on the data.

Note

One thing should be said up front and kept in mind: Linq-to-SQL is not a tool to build your middle tier. Don't be fooled by the fact it uses objects. It should be seen, instead, as a powerful tool to build a data access layer using objects and a high-level query syntax rather ...