Web Api Request.CreateResponse HttpResponseMessage no intellisense VS2012

Question

For some reason, Request.CreateResponse is now \"red\" in VS2012 and when I hover over the usage the IDE says

Cannot resolve symbol \'Cre

Answer 1

Because this extension method lives in System.Net.Http, you just need to include it in your usings statements.

using System.Net.Http;

Answer 2

You need to add a reference to System.Net.Http.Formatting.dll. The CreateResponse extension method is defined there.

Answer 3

You can use

 HttpResponseMessage result = new HttpResponseMessage(HttpStatusCode.Gone)

instead of

 Request.CreateResponse(HttpStatusCode.Gone)

Answer 4

This is because you have to do:

namespace GOCApi.Controllers
{
    [RoutePrefix("Courses")]
    public class CoursesController : ApiController
    {
        private ICoursesRepository _coursesRepository { get; set; }

        public CoursesController(ICoursesRepository coursesRepository)
        {
            _coursesRepository = coursesRepository;
        }

        [GET("{id}")]
        public HttpResponseMessage Get(int id)
        {
            var course = _coursesRepository.GetSingle(id);
            if (course == null){
               return this.Request.CreateResponse(HttpStatusCode.NotFound, "Invalid ID");
            }
            return this.Request.CreateResponse(HttpStatusCode.OK, course);
        }
    }
}

Note the this.
In my case the compiler now gets it. Saw the example here

Answer 5

This a known issue with VB.NET and Request.CreateResponse.

There is a workaround: Missing request.CreateResponse in vb.net Webapi Projects

Answer 6

Add a reference to System.Web.Http to the project. Then add

Using System.Web 

to the top of the cs file.