using System;

using System.Text;

using System.Text.Json;

using System.Text.Json.Serialization;

​

public class Program

{

    public static void Main()

    {

        var address = new AddressInfo

        {

            AddressId = 1,

            AddressLine1 = "hello",

            AddressLine2 = "£志",

            City = "Austin"

        };

        string strAddress = address.StringAddress();

        Console.WriteLine(strAddress);

        if (Encoding.UTF8.GetByteCount(strAddress) != strAddress.Length){

        throw new ArgumentNullException($"Order contaions non ASCII character(s).");

        }

        Console.WriteLine("Shipped!!");

    }

    public class AddressInfo

    {

        public int AddressId { get; set; }

        public string CustomerId { get; set; }

        public string FirstName { get; set; }

        public string LastName { get; set; }

        public string AddressLine1 { get; set; }

        public string AddressLine2 { get; set; }

        public string City { get; set; }

        public string PostalCode { get; set; }

        public string RegionName { get; set; }

        public string CountryCode { get; set; }

        public string CountryName { get; set; }

        public string TelNumber { get; set; }

        public DateTime DateCreated { get; set; }

        public DateTime DateLastChanged { get; set; }

        public string UsernameChangedBy { get; set; }

        public string CountrySymbol { get; set; }

        public string CompanyName { get; set; }

        public string Fax { get; set; }

        public string EmailAddress { get; set; }

          public string StringAddress()

        {

             string strAddress = "";

​

            foreach (var prop in this.GetType().GetProperties())

            {

                var propValue = prop.GetValue(this);

                if (propValue is string)

                {

                    strAddress += propValue;

                }

            }

              return strAddress;

        }

    }

}