public IHttpActionResult GiveTheBook(OrderDTO order)    //Librarian can give book to client, client must to make order first
        {
            //if (!ModelState.IsValid)
            //    return BadRequest();

            _libContext.GiveTheBook(order);

            return(Created(new Uri(Request.RequestUri + "/" + order.IsGiven), order.OrderID));
        }
        public IHttpActionResult GiveTheBook(OrderDTO order)
        {
            if (!ModelState.IsValid)
            {
                return(BadRequest());
            }

            _libContext.GiveTheBook(order);

            return(Created(new Uri(Request.RequestUri + "/" + order.OrderedBook), order.OrderID));
        }