public IActionResult BuyBook([FromBody] BuyBookModel model) { double.TryParse(model.DeliveryCost, out double cost); var serviceType = (DeliveryType)Enum.Parse(typeof(DeliveryType), model.DeliveryService); IDelivery delivery = _deliveryServiceGenerator.ExecuteCreation(serviceType, cost); var orderInfo = delivery.GetInfo(); return(Ok(orderInfo)); }