Exception: failed to serialize the response body in ASP.Net MVC 5 Web Api

Question

So, I am learning how to create a Web Api in ASP.Net MVC 5. And I am stuck at one place and need guidance.

Steps Taken:

• Created an API Folder in Controller Folder and then a file "ResumesController.cs" inside it.

ResumesController.cs

public class ResumesController : ApiController
{
    private ApplicationDbContext _context;

    public ResumesController()
    {
        _context = new ApplicationDbContext();
    }

    //GET /api/resumes
    public IEnumerable<Resume> GetResumes()
    {
        var candidateId = User.Identity.GetUserId();
        var resumeList = _context
            .Resumes.Where(r => r.CandidateId == candidateId)
            .OrderByDescending(r => r.datetime);

        return resumeList;
    }

}

Global.Asax

 protected void Application_Start()
        {
            GlobalConfiguration.Configure(WebApiConfig.Register);
            AreaRegistration.RegisterAllAreas();
            FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
            RouteConfig.RegisterRoutes(RouteTable.Routes);
            BundleConfig.RegisterBundles(BundleTable.Bundles);
        }

Url exceuted:

http://localhost:44395/api/resumes

Error Message:

The 'ObjectContent`1' type failed to serialize the response body for content type 'application/xml; charset=utf-8'.

Non Api Attempt: Works Fine

  public ActionResult ResumeCenter()
        {
            var candidateId = User.Identity.GetUserId();
            var resumeList = _context
                .Resumes.Where(r => r.CandidateId == candidateId)
                .OrderByDescending(r => r.datetime);

            return View(resumeList);
        }

Folder and File Structure:

Question 1: I am learning via a tutorial and I don't understand how come I need to call api/resumes? Wy don't I need to call something like /api/GetResumes?

Question 2: Why am I not able to see the XML view of data returned?

P:S: Breakpoint is getting hit in the API Controller Action.

Attempt 1:

 protected void Application_Start()
    {
        GlobalConfiguration.Configure(WebApiConfig.Register);
        GlobalConfiguration.Configuration.Formatters.JsonFormatter.SerializerSettings
.ReferenceLoopHandling = Newtonsoft.Json.ReferenceLoopHandling.Ignore;
        GlobalConfiguration.Configuration.Formatters
            .Remove(GlobalConfiguration.Configuration.Formatters.XmlFormatter);
        AreaRegistration.RegisterAllAreas();
        FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
        RouteConfig.RegisterRoutes(RouteTable.Routes);
        BundleConfig.RegisterBundles(BundleTable.Bundles);
    }