Exception: A socket operation has encountered a dead network

[weird0]

I am a beginner to socket programming to in c#. I know the concepts
as to how to program them. I get the above exception when i tried
writing the code for the server side on the line tcpListener.Sta rt()
when i passed the localhost ip and port no. 4000:

Please help...

namespace Server
{
class Server
{
TcpListener tcpListener;
IPAddress ipAddress;
IPEndPoint remoteEP;

public Server(string ipaddress, int Port)
{
ipAddress = IPAddress.Parse (ipaddress);
tcpListener = new TcpListener(ipA ddress,Port);
remoteEP = new IPEndPoint(ipAd dress, Port);
}

public void Start()
{
try
{
tcpListener.Sta rt(); // line of exception
}
catch (Exception ex)
{
MessageBox.Show ("Problem:" + ex.Message);
}
}

public void Stop()
{
tcpListener.Sto p();
}

}

}

[Michael D. Ober]

"Peter Duniho" <Np*********@nn owslpianmk.comw rote in message
news:op******** *******@petes-computer.local. ..

On Thu, 12 Jul 2007 07:33:50 -0700, Michael D. Ober
<obermd.@.alum. mit.edu.nospamw rote:

>OP's code was setting up a listener socket. You need one of your local
IPs
(other than 127.0.0.1) for an external system to be able to connect to
it.
If you use 127.0.0.1 only applications on your local system can connect.

All true statements. So?

Have you never used your localhost address for testing purposes?

Yes I have.

>
It's not a good idea to specify _any_ specific IP address for a listening
socket anyway. But if one is going to do so, there's nothing
fundamentally wrong with using the localhost address versus some other
locally valid address.

If your network adapters, and thus, IP Addresses, are on different networks
and you want only traffic from one of the networks, you must specify the
address. On most systems, this isn't an issue, but it can be.

Mike.

[Peter Duniho]

On Thu, 12 Jul 2007 12:38:51 -0700, Michael D. Ober
<obermd.@.alum. mit.edu.nospamw rote:

If your network adapters, and thus, IP Addresses, are on different
networks
and you want only traffic from one of the networks, you must specify the
address. On most systems, this isn't an issue, but it can be.

Yup. There certainly are cases where binding to a specific IP address is
needed. I was speaking of the general case, and in any case none of that
suggests that the OP wasn't using the basic localhost address.