I got a few mails and saw a few forum posts about the confusion created by new locations for dll/exe in beta2. So here is where you can find LINQ to SQL related files. New .NET Framework 3.5 DLLs ( ">green bits ) are in: Program Files\Reference Assemblies\Microsoft\Framework\v3.5\ SqlMetal.exe is in Program Files\Microsoft SDKs\Windows\V6.0A\Bin\ Another source of confusion - designer vs. SqlMetal The visual designer for generating mapped LINQ to SQL classes is a part of Visual Studio 2008. You need
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