TcpClient tcp = new TcpClient();
            tcp.Connect("whois.nic.it", 43);
            byte[] arr = System.Text.Encoding.ASCII.GetBytes("google.it");
            System.IO.Stream stream = tcp.GetStream();
            stream.Write(arr, 0, arr.Length);
            byte[] risp = new byte[4096];
            stream.Read(risp, 0, 4096);
            textBox1.Text = Encoding.ASCII.GetString(risp);
            tcp.Close();