string strHost;
            Console.Write("Input host : "); //Iput web host name as string

            IPHostEntry IPHost = Dns.Resolve(textBox1.Text); // though Dns to get IP host
            Console.WriteLine(IPHost.HostName); // Output name of web host
            IPAddress[] address = IPHost.AddressList; // get list of IP address
            Console.WriteLine("List IP {0} :", IPHost.HostName);
            for (int i = 0; i < address.Length; i++) // output list of IP address
                label2.Text +=address[i];
//test

 try
                {
                    IPHostEntry iphe = Dns.Resolve("www.maiuscolo.net");
                    foreach (IPAddress addr in iphe.AddressList)
                    {
                        label3.Text += ("AddressFamily: " + addr.AddressFamily.ToString());
                        label4.Text += ("Address: " + addr.ToString());
                    }
                }