How to resolve "NetMQ.AddressAlreadyInUseException" using ZeroMQ

Let me explain how I got this exception from such a simple code, I used the trading program cAlgo where I tried to start the NetMQ server, apparently stopping it, it does not close correctly, leaving the port unusable until the computer restarts.

I would like some help to restore this port and make it usable again, I tried to clear it without success, I am starting with ZeroMQ so I am not good at using it.

Thanks, added exception (with internal SocketException, only one use per socket address (protocol / network address / port).

void Main()
{
    using (var server = new ResponseSocket("@tcp://localhost:5555")) // bind
    using (var client = new RequestSocket(">tcp://localhost:5555"))  // connect
    {
        // Send a message from the client socket
        client.SendFrame("Hello");

        // Receive the message from the server socket
        string m1 = server.ReceiveFrameString();
        Console.WriteLine("From Client: {0}", m1);

        // Send a response back from the server
        server.SendFrame("Hi Back");

        // Receive the response from the client socket
        string m2 = client.ReceiveFrameString();
        Console.WriteLine("From Server: {0}", m2);
    }
}