References for DBContext, DBSet<> in Entity Framework

Question

I am trying to use ADO.Net Codefirst feature of latest Entity Framework 4.0. As part of that I have installed Entity Framework CTP 4 from Microsft and using Scott\'s tutorial t

Answer 1

Use "DbContext" vs "DBContext", and "DbSet" vs "DBSet". The case sensitivity is the issue.

Answer 2

Use CTP5 instead it is newer version with some changes in API. You have to add reference to EntityFramework.dll which is installed in CTP directory - default is: c:\Program Files\Microsoft ADO.NET Entity Framework Feature CTP5\Binaries\EntityFramework.dll for 32bit system. On 64bit system it will be placed in Program Files (x86).

Answer 3

You can use the Library Package Manager if you have it (it installs automatically with MVC 3.0).

From within your project in Visual Studio 2010, go to

Tools > Library Package Manager > Package Manager Console

From within your project in Visual Studio 2013, go to

Tools > NuGet Package Manager > Package Manager Console

In the console, after the PM> prompt, type

install-package entityframework

This will install the package and add the EntityFramework reference to your project.

Answer 4

The blogpost mentions the assembly:

The DbContext and DbSet classes used above are provided as part of the EF4 Code-First library. You’ll need to add a reference to the System.Data.Entity.CTP assembly that is installed into the \Program Files\Microsoft ADO.NET Entity Framework Feature CTP4\Binaries directory to reference these classes. You’ll also want to add a “using System.Data.Entity” namespace statement at the top of your “NerdDinners” class file.

However I do believe the new CTP5 includes some changes to codefirst, so I would suggest to take a look at that one instead.

Answer 5

To add EF to your project use the Package Manager Console and issue the command:

Install-Package EntityFramework

You shouldn't link directly to the DLLs' installed location as mentioned in another answer.