I am creating a simple server (C#) and client (python) that communicate using sockets.

The server create a

var listener = new Socket(AddressFamily.InterNetwork,SocketType.Stream, ProtocolType.Tcp)

then binds, listens in a infinite loop

while (true)
{// Set the event to nonsignaled state.AllDone.Reset();// Start an asynchronous socket to listen for connections.Console.WriteLine("Waiting for a connection...");listener.BeginAccept(AcceptCallback, listener);// Wait until a connection is made before continuing.AllDone.WaitOne();
}

the AcceptCallback calls BeginReceive whose callbackk reads the buffer and sends back a message to the client

everything works. Client sends a message, server sees it, replies, client sees it. But when the client tries to send a message again (for testing client is in a loop), nothing happens

the python client:

sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.connect((host, port))
while True:sock.sendall(data)blockLen = sock.recv(32) #server sends back a string prefixed with how long the string isserverReply = sock.recv(blockLen)

how do i keep the socket from dying?

this is from MSDN(Remarks on EndAccept):

Your callback method should invoke the EndAccept method. When yourapplication calls BeginAccept, the system usually uses a separatethread to execute the specified callback method and blocks onEndAccept until a pending connection is retrieved. EndAccept willreturn a new Socket object that you can use to send and receive datawith the remote host. You cannot use this returned Socket to acceptany additional connections from the connection queue. If you want theoriginal thread to block after you call the BeginAccept method, useWaitHandle.WaitOne. Call the Set method on a ManualResetEvent in thecallback method when you want the original thread to continueexecuting.

and there is another question on stackoverflow check.will it be helpful?