// PUT: api/Author/5
        public HttpResponseMessage Put(int id, [FromBody] AuthorEntity entity)
        {
            var author = AuthorBLL.UpdateAuthor(id, entity);

            if (author == null)
            {
                return(Request.CreateResponse(HttpStatusCode.NotFound));
            }

            return(Request.CreateResponse(HttpStatusCode.Created, author));
        }