IpEndPoint problem

Prog in C #:

  private void listBox1_Click(object sender, EventArgs e)
  {
        String data = (String)this.listBox1.SelectedItem;
        data = data.TrimEnd(new char[] { '\r', '\n' });

        try
        {
            ip = Dns.GetHostAddresses(data);
        }
        catch (SocketException ex)
        {
            MessageBox.Show(ex.ErrorCode.ToString());
        }

        clientIP = new IPEndPoint(ip[0], 6000);

        newSock.Bind(clientIP);
        newSock.Listen(100);

        resetEvent.Set();
    }

      

        
        
        
      

    

In the above code, I get the ip-address of the remote host, which is displayed in the list, and accordingly, to start receiving messages, I need to create IPEndPoint

( clientIP

).

newSock

is a variable of type socket, initialized as:

newSock = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);

      

        
        
        
      

    

The problem is on the line where I bind the newSock socket to the IPIndPoint clientIP, where I get the error that it is an invalid address. However, to cross-check, I tried to display the ip address in the message box, which it did correctly. So what exactly is going wrong?