The type or namespace name 'DbContext' could not be found [closed]

Answer 1

You need to reference the System.Data.Entity assebmly to your project or install the EntityFramework NuGet package which will setup everything for you.

Answer 2

I had the same problem using VS2010. I know this isn't really an answer. I just thought it might help someone. I resolved it by using the fully qualified name for DBContext.

Instead of

public class MachineDbContext : DbContext

I used

public class MachineDbContext : System.Data.Entity.DbContext

and rebuilt the project. Suddenly VS was happy, and I was even able to remove the fully qualified name, and just use DBContext.

Answer 3

Like the others have suggested:

1. Add the correct references and directives. But it still doesn't work? Maybe you have the same problem I did:

Have a look below and see if you can tell me what is wrong:

public class PanelLengthContext : DBContext { } ??!

Make sure the class name is not misspelt - (case sensitivity)!

• DbContext is the correct spelling.
• this is how it should look:
• check the spelling. don't waste 20 min of your life like i did. public class PanelLengthContext : DbContext {}

HTH

Answer 4

you can try on package manager console

PM> EntityFrameWork\enable-migrations

Answer 5

I had the same issue. Turns out, you need the EntityFramework.dll reference (and not System.Data.Entity).

I just pulled it from the MvcMusicStore application which you can download from: http://mvcmusicstore.codeplex.com/

It's also a useful example of how to use entity framework code-first with MVC.

Answer 6

Just a quick note. It is DbContext, not DBContext. i.e. with a lowercase 'B'. I discovered this because I had the same problem while intelesense was not working until I tried typing the full name space System.Data.Entity... and name and finally it suggested the lowercase 'b' option:-

System.Data.Entity.DbContext