// POST api/review
 public HttpResponseMessage Post(Comment comment)
 {
     var response = Request.CreateResponse(HttpStatusCode.Created, comment);
     response.Headers.Location = new Uri(Request.RequestUri, string.Format("reviews/{0}", comment.Id));
     _commentsRepository.Add(comment);
     return response;
 }
 // PUT api/review/5
 public void Put(Comment comment)
 {
     _commentsRepository.Update(comment);
 }