Va puteti "juca" cu LINQ gratuit 90 de minute in urmatorul laborator: MSDN Virtual Lab: Mapping Your Objects to Database Tables with LINQ to SQL 

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Cristian Andrei Lefter, SQL Server MVP
MCT, MCSA, MCDBA, MCAD, MCSD .NET,
MCTS, MCITP - Database Administrator SQL Server 2005
http://sqlserver.ro