Is it possible to detect if a socket is in the CLOSE_WAIT state?

Question

I am using a TcpClient object to send and receive data. When a client loses its connection, I can see by using TcpView that its associated connection is in a CLOSE_WAIT state. Is it possible in c# to see the state of a socket? I simply want to detect the CLOSE_WAIT state so I can close the socket on the server end. I understand that I can wait to receive bytes for a certain amount of time and then close the connection if nothing is received. I just would rather close the socket and its thread immediately. Is the socket's state able to be detected on the c# side? The TcpView program can determine this. Can ac# program do this?

Answer 1

It's not ideal, but if you check socket.Available , it'll throw a SocketException . You still need to check the reason, though.

Also not ideal, because it's a bit clunky, is to call Poll() (with SelectRead ). If it returns true , either there's data to read or the connection is closed. If there's no data to read, then that's your answer.