If you have a situation like this:
// do some work
socket.BeginSend(buffer, 0, buffer.Length, 0, new AsyncCallback(MyCallback), s);
void MyCallback(IAsyncResult ar)
Socket s = (Socket) ar.AsyncState;
And you send a big buffer over a slow connection it can happen that calling EndSend() will throw a SocketException ‚The I/O operation has been aborted because of either a thread exit or an application request‘.
This happens because the Thread that started the sending is no more available when the sending ends. The only solution I know is to make sure the thread is still available or to use syncronous sending if possible.