// Add new item
 public Semester AddSemester(SemesterAdd Semester)
 {
     // Map from DTO object to domain (POCO) object
     var p = ds.Semesters.Add(Mapper.Map<ICTGWS.Models.Semester>(Semester));
     ds.SaveChanges();
     // Map to DTO object
     return Mapper.Map<Semester>(p);
 }
        public HttpResponseMessage PostSem(SemesterAdd semester)
        {
            if (ModelState.IsValid)
            {
                // Add the new item
                var c = r.AddSemester(semester);

                HttpResponseMessage response = Request.CreateResponse(HttpStatusCode.Created, semester);
                response.Headers.Location = new Uri(Url.Link("DefaultApi", new { id = semester.SemesterId }));
                return response;
            }
            else
            {
                return Request.CreateResponse(HttpStatusCode.BadRequest);
            }
        }