// Create
        public HttpResponseMessage Post(Lesson lesson)
        {
            Uow.Lessons.Add(lesson);
            Uow.Commit();

            var response = Request.CreateResponse(HttpStatusCode.Created, lesson);

            response.Headers.Location = new Uri(Url.Link(WebApiConfig.ControllerAndId, new { id = lesson.Id }));

            return response;
        }
 // Update
 public HttpResponseMessage Put(Lesson lesson)
 {
     Uow.Lessons.Update(lesson);
     Uow.Commit();
     return new HttpResponseMessage(HttpStatusCode.NoContent);
 }