c# - DbContext not available -

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i developing application using web form , database first approach (linq sql). have not been able dbcontext class. not reference it. have visual studion 2010 service pack 1 , mvc 3 installed.

what doing wrong?

dbcontext class entity framework. linq sql should datacontext. using database first approach, there should class inherited datacontext. search under .dbml file in solution explorer. if have northwind.dbml generated context class should have name northwinddatacontext.


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