using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Text;
using System.Threading.Tasks;

namespace SharpDNSResolver
{
    class DNSResolver
    {
        static void Main(string[] args)
        {
            try
            {
                if(args.Count() == 0)
                {
                    Console.WriteLine("You must provide an host!");
                    Environment.Exit(1);
                }
                string hostname = args[0];
                IPHostEntry hostEntry = Dns.GetHostEntry(hostname);

                Console.WriteLine($"Host : {hostEntry.HostName}");

                Console.WriteLine("Ip address:");
                foreach (IPAddress ipAddress in hostEntry.AddressList)
                {
                    Console.WriteLine($"  {ipAddress}");
                }
            }
            catch (System.Net.Sockets.SocketException ex)
            {
                Console.WriteLine($"Error : {ex.Message}");
            }
        }
    }
    
}