Can not use the DbContext class

Question

I write a ASP.NET MVC3 application ,but after I drag the System.Data.Entity in to the VS2010 and using it ,I found I can not use the class DbContext.My System.Data.Entity version was 4.0 , What did I missed? Waiting for the help in to snow ground!!!

beg for your help....

Answer 1

Hey——

What do you mean by saying——drag the System.Data.Entity? This is a namespace, how can you drag it like a control???

It seems that you are using EF(4.1）——Code First。I recommand you to intall an vsix for VS2010, and the download the EntityFramework as the following steps:

1) Open your Vs and open your proj, then click the Extension Manager:

2）Then search for the nuget and download it:

3）Then load the EntityFramework.dll into your proj, plz follow the torturial:

1）View –> Other Windows –> Package Manager Console 

2) http://johnpapa.net/upgrading-to-entity-framework-4-1-rc

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Answer 2

Yes , thanky you for your advice,I  have solve the problem in another way. After that I found your way is correct。Thank you very much.