public Car Post(Car car) {
     if (null != car) {
         car.Id = 1;
         return car;
     }
     throw new HttpResponseException(new HttpResponseMessage() {
         StatusCode = HttpStatusCode.BadRequest,
         ReasonPhrase = "Car data must contain at least one value."
     });
 }
 public Car Put([FromUri]int id, Car car) {
     return car;
 }
 private void writeItem(Car car, StreamWriter writer) {
     writer.WriteLine("{0},{1},{2},{3},{4}", Escape(car.Id),
                      Escape(car.Make), Escape(car.Model), Escape(car.Year), Escape(car.Price));
 }