C# .NET Socket connection issue - Only one usage of each socket address is normally permitted

Question

I am having the following issue:

Once I close my WM6 application and then try to start it again i get this error: Only one usage of each socket address (protocol/network address/port) is normally permitted at System.Net.Sockets.Socket.Bind(EndPoint localEP) at System.Net.Sockets.Socket.TcpListener.Start() ...

I think this is due to the time interval for the connection to timeout, so I would like to close all open conections and force it to create a new connection, is this the correct way to proceed or is there a different way to handle this?

Here is the code used to start listening:

/// <summary>
/// Listens Asynchronously to Clients, creates a recieveMessageHandler to process the read.
/// 
/// Check WIKI, TODOS
/// </summary>
/// <returns></returns>
public void Listen()
{
    myTcpListener.Start();

    while (true)
    {
        //blocks until a client has connected to the server
        try
        {
            TcpClient myTcpClient = myTcpListener.AcceptTcpClient();
            DateTime now = DateTime.Now;
            //Test if it's necessary to create a client
            ClientConnection client = new ClientConnection(myTcpClient, new byte[myTcpClient.ReceiveBufferSize]);

            // Capture the specific client and pass it to the receive handler
            client.NetworkStream.BeginRead(client.Data, 0, myTcpClient.ReceiveBufferSize, r => receiveMessageHandler(r, client), null);
        }
        catch (Exception excp)
        {
            Debug.WriteLine(excp.ToString());
        }
    }
}

Answer 1

Yes, your server socket is likely in the TIME_WAIT state.

You can access the underlying ServerSocket and then use SetSocketOption and specify ReuseAddress.