using System;

using System.Collections.Generic;

using System.Net;

​

namespace IPAddressPlaying

{

    class Program

    {

        static void Main(string[] args)

        {

            List<String> listStrIPv4 = new List<string>();

            List<String> listStrIPv6 = new List<string>();

​

            listStrIPv4.Add("");

            listStrIPv4.Add("004.015.89.38");

            listStrIPv4.Add("192.03.000.1");

            listStrIPv4.Add("");

​

            listStrIPv6.Add("");

            listStrIPv6.Add("1998:ffff:ab12:0000:0000:0000:0000:0001");

            listStrIPv6.Add("2001:0db8:85a3:0000:0000:8a2e:0370:7334");

            listStrIPv6.Add("");

​

            ListStrToListIP(listStrIPv4);

            ListStrToListIP(listStrIPv6);

​

            Console.WriteLine("Any: " + IPAddress.Any);

            Console.WriteLine("IPv6Any: " + IPAddress.IPv6Any);

            Console.WriteLine("IPv6None: " + IPAddress.IPv6None);

            Console.WriteLine("None: " + IPAddress.None);

​

            IPAddress address;

            Console.WriteLine("Can IPAddress parse IPv6 address '::'? Answer: " + IPAddress.TryParse("::", out address));

            Console.WriteLine("Can IPAddress parse IPv6 address ''? Answer: " + IPAddress.TryParse("", out address));

​

​

            // IPAddress will detect and store type of IP entered

            string strIPv6 = "2001:0db8:85a3:0000:0000:8a2e:0370:7334";

            IPAddress IPv6 = IPAddress.Parse(strIPv6);

            Console.WriteLine(strIPv6 + " is of AddressFamily: " + IPv6.AddressFamily);

            Console.WriteLine(strIPv6 + " is of HashCode: " + IPv6.GetHashCode());

            Console.WriteLine(strIPv6 + " is this an IPv4 mapped on to IPv6?: " + IPv6.IsIPv4MappedToIPv6);

​

            // IPv4 mapped as IPv6:

            string strIPv4onIPv6 = "0000:0000:0000:0000:0000:FFFF:12.155.166.101";

            IPAddress IPv4onIPv6 = IPAddress.Parse(strIPv4onIPv6);

            Console.WriteLine(strIPv4onIPv6 + " is this an IPv4 mapped on to IPv6?: " + IPv4onIPv6.IsIPv4MappedToIPv6);

​

            Console.ReadLine();

        }

        public static List<IPAddress> ListStrToListIP(List<string> listStrIp)

        {

            var listIPIp = new List<IPAddress>();

            foreach (string ipAddress in listStrIp)

            {

                IPAddress address;

                // If any IP in list is "" then that IP is skipped. Does this cause issues?

                // Does any program expect IPs to be in certain locations of list?

                // why does is out address required?

                if (IPAddress.TryParse(ipAddress, out address))

                {

                    listIPIp.Add(IPAddress.Parse(ipAddress));

                }

            }

            for (int i = 0 ; i < listIPIp.Count ; i++)

            {

                Console.WriteLine("Element " + i + " of listIPIp = " + listIPIp[i]);

            }

            return listIPIp;

        }

    }

}

​