C# Domain Whois

private void Form1_Load(object sender, EventArgs e)

 {

 string txtResponse = String.Empty;

 string strResponse = String.Empty;

TcpClient tcpWhois = new TcpClient("whois.internic.net", 43);

 NetworkStream nsWhois = tcpWhois.GetStream();

 BufferedStream bfWhois = new BufferedStream(nsWhois);

StreamWriter swSend = new StreamWriter(bfWhois);

 swSend.WriteLine("mustafaydemir.com");

 swSend.Flush();

StreamReader srReceive = new StreamReader(bfWhois);

while ((strResponse = srReceive.ReadLine()) != null)

 {

 txtResponse += strResponse + "\r\n";

 }

tcpWhois.Close();

 richTextBox1.Text = txtResponse;

}