Best way to update LINQ to SQL classes after database schema change

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You can use SQLMetal.exe to generate your dbml and or cs/vb file. Use a pre-build script to start it and target the directory where your datacontext project belongs. 

C:\Program Files\Microsoft SDKs\Windows\v6.0A\Bin\x64\sqlmetal.exe 
  /server:<SERVER> 
  /database:<database> 
  /code:"path\Solution\DataContextProject\dbContext.cs" 
  /language:csharp 
  /namespace:<your namespace>

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