The type or namespace name 'Entity' does not exist in the namespace 'System.Data'

Question

I\'m using WS class and it gave me error when I run the application:

The type or namespace name \'Entity\' does not exist in the namespace \'System.Data\' 
<         


        

Answer 1

I just had the same error with Visual Studio 2013 and EF6. I had to use a NewGet packed Entity Framework and done the job perfectly

Answer 2

tried reinstall - no luck. i had to refresh a table in my model before it would find Entity.

Answer 3

I had the same errors.

I added System.Data.Entity.Repository from Nuget Packages and the errors disappears.

Hope it wil help!

Answer 4

I will add my answer to cover all cases:

My solution was unistalling EntityFramework from NuGet Package Manager and then I was prompted to restart Visual Studio because it couldn't "finalize the uninstall".

I restarted Visual Studio and reinstalled EntityFramework then my problem was solved.

Hope this helps someone!

Answer 5

It's helped me, I uninstalled EF, restarted VS and I added 'using':

using System.Data.Entity;
using System.Data.Entity.Core.Objects;
using System.Data.Entity.Infrastructure;

Answer 6

Thanks every body! I found the solution. not that I understand why but I tried this and it worked! I just had to add a reference to: System.Data.Entity.Design and don't have to write any using in the code. Thanks!