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I'm developing a server-client application that uses 3 ports [TCP SOCKET .Net 4.0].. So the application gives the user the choice to set the port for the main socket only. but I want to let the server application to automatically find available port for the other 2 sockets so it sends the port value to the client using the main socket connection. then the client connect to the other socket using the received port value. here's a little explanation: the main socket listens on a configurable port. this socket accepts client to start send/receive commands. (file explorer/task manager/properties/shutdown/chat) the second socket is for file transfer only to transfer files and it closes when its done. the third socket is only for receive/send a screenshot. [i know you might say that i should use the same socket for file transfer and screenshot but its a little complicated. i just use separate sockets for each one of them.] so how do i find an available port before bind the socket with the endpoint? something like this : int port = 10000; bool isAvailable = false; while(!isAvailable) { try { // check if the port is available to use. isAvailable = true; } catch { port++; } }

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