public List<Address> GetAddresses()
        {
            List<Address> addresses = new List<Address>();
            Address address1 = new Address("解放路", "宁波", "中国", 315000);
            Address address2 = new Address("中山路", "杭州", "中国", 31000);
            Address address3 = new Address("人民路", "温州", "中国", 31000);

            addresses.Add(address1);
            addresses.Add(address2);
            addresses.Add(address3);

            return addresses;
        }
        public Address GetAddress(string street, string city, string country, int zip)
        {
            Address address = new Address(street, city, country, zip);

            return address;
        }