public void DeleteFare(ShippingFare fare)
        {
            if (fare == null)
            {
                throw new ArgumentNullException(nameof(fare));
            }

            context.ShippingFares.Remove(fare);
        }
        public void AddFare(ShippingFare fare)
        {
            if (fare == null)
            {
                throw new ArgumentNullException(nameof(fare));
            }

            context.ShippingFares.Add(fare);
        }
 public void UpdateFare(ShippingFare fare)
 {
     //no need write code.
 }