Csharp/C Sharp by API/System.Net/Dns

Dns.EndResolve(IAsyncResult ar)

  
using System;
using System.Drawing;
using System.Net;
using System.Text;
using System.Windows.Forms;
class MainClass
{
   private static void Resolved(IAsyncResult ar)
   {
      string buffer;
      IPHostEntry iphe = Dns.EndResolve(ar);
      buffer = "Host name: " + iphe.HostName;
      Console.WriteLine(buffer);
      foreach(string alias in iphe.Aliases)
      {
         buffer = "Alias: " + alias;
         Console.WriteLine(buffer);
      }
      foreach(IPAddress addrs in iphe.AddressList)
      {
         buffer = "Address: " + addrs.ToString();
         Console.WriteLine(buffer);
      }
   }
   public static void Main()
   {
      AsyncCallback OnResolved;
      OnResolved = new AsyncCallback(Resolved);
      string addr = "www.nfex.ru";
      Object state = new Object();
      Dns.BeginResolve(addr, OnResolved, state);
   }
}

Dns.GetHostByAddress(IPAddress ip)

  
using System;
using System.Net;
class MainClass
{
   public static void Main(string[] argv)
   {
      IPAddress test = IPAddress.Parse("64.200.123.1");
      IPHostEntry iphe = Dns.GetHostByAddress(test);
      foreach(string alias in iphe.Aliases)
      {
         Console.WriteLine("Alias: {0}", alias);
      }
   }
}

Dns.GetHostByName

  
using System;
using System.Net;
class MainClass
{
    public static void Main()
    {
        IPHostEntry ihe = Dns.GetHostByName(Dns.GetHostName());
      IPAddress myself = ihe.AddressList[0];
        Console.WriteLine(myself);
    }
}

Dns.GetHostEntry(String value)

  
using System;
using System.Net;
class MainClass
{
    public static void Main(string[] args) 
    {
        foreach (string comp in args) 
        {
            try
            {
                IPAddress[] addresses = Dns.GetHostEntry(comp).AddressList;
                foreach (IPAddress address in addresses)
                {
                    Console.WriteLine("{0} = {1} ({2})", 
                        comp, address, address.AddressFamily);
                }
            }
            catch (Exception ex)
            {
                Console.WriteLine("{0} = Error ({1})", comp, ex.Message);
            }
        }
    }
}

Dns.GetHostName()

  
using System;
using System.Net;
class MainClass
{
    public static void Main()
    {

        Console.WriteLine(Dns.GetHostName());
    }
}

Dns.Resolve

 
using System;
using System.Net;
class MainClass
{
   public static void Main(string[] argv)
   {
      IPHostEntry iphe = Dns.Resolve("62.208.12.1");
      Console.WriteLine("Host name: {0}", iphe.HostName);
      foreach(string alias in iphe.Aliases)
      {
         Console.WriteLine("Alias: {0}", alias);
      }
      foreach(IPAddress address in iphe.AddressList)
      {
         Console.WriteLine("Address: {0}",
                     address.ToString());
      }
   }
}