If you’re using SQL Server and LINQ you need SqlTac. SqlTac builds most complete, robust and powerful N-Tier ORM DataAccess layer. The generated DataAccess layer is based on LINQ To SQL. SqlTac will build either CSharp or VB.NET. Over 25 different options can be used when generating the DataAccess Layer. Out of the gate, SqlTac’s generated DataAccess layer supports: WCF, REST, Windows Messaging, Obfuscation and your supplied custom attributes.  

       SqlTac will give you an independent review of your database design within seconds. While SqlTac will rate you database, it will also give you a list of concrete issues to be reviewed. With a click of a mouse SqlTac can fix most of issues it detects. 

       Documenting your database with SqlTac is a breeze. Your documentation will be visible inside of SSMS, VS 2008 via IntelliSense and/or a Windows HelpFile.   

       SQLTAC is an ideal tool for any programmer who is part of a team that is developing a database-driven application in Visual Studio 2008, and being involved in both the database and the front-end. Phil Factor calls it a ‘Swiss-Army knife’: He added ruefully that, like the original knife, it still had the tool for taking stones out of horses’ hooves'. 

      SqlTac supports: Free N-Tier Based LINQ Training By Example

       .NET Framework 3.5 SP1, Visual Studio 2008 and Sql Server 2000/2005/2008