The type or namespace 'Http' doesn't exist in the namespace 'System.Web' in Web API

Question

I'm trying to create a Web API following this link . I have exactly added the way it is shown in this article.

But after adding the controller, it is giving me this error for System.Web.Http and ApiController.

Error message on System.Web.Http :

The type or namespace Http doesn't exist in the namespace 'System.Web'

Error message on ApiController:

The type or namespace ApiController could not be found.

Additional Information :

I'm using Visual Studio 2015 Professional. Framework : .NET Framework 4.6.1

I have searched a lot about this issue but couldn't find anything solution.I'm sure i'm missing very small details somewhere but can anyone help me here.
Thanks a lot in advance.

did you add the system.web library as a reference in your project? — peeyush singh, Jan 08 '19 at 06:28
check if `System.Web` and `System.Web.Http` is present in references. Did you select web api project at the time of project creation? — prisar, Jan 08 '19 at 06:36
I have System.Web in the references list. But System.Web.Http is with a warning (yellow) symbol. So I'm guessing it is not able load. — CrazyCoder, Jan 08 '19 at 06:41
Also , I tried to search System.Web.Http in the references window. I couldn't find it. — CrazyCoder, Jan 08 '19 at 06:44
@t-prisar , I have selected Empty Template. Then in 'Add Folders and Core references' I checked Web API — CrazyCoder, Jan 08 '19 at 06:48

score 19 · Accepted Answer · answered Jan 08 '19 at 09:03

19

It turns out that to get System.Web.Http, I need to install package - Microsoft.AspNet.WebApi.Core from Nuget. After installing, it solved my problem.

answered Jan 08 '19 at 09:03

CrazyCoder

2,194
10
44
91

The type or namespace 'Http' doesn't exist in the namespace 'System.Web' in Web API

1 Answers1

Linked