代码片段

public InitState Initialize()
{
    ...
    IPHostEntry hostEntry = Dns.GetHostEntry(Dns.GetHostName());
    ...
    IPAddress localAddress = null;
    for (int i = 0; i < hostEntry.AddressList.Length; ++i)
    {
        //IPv4 address
        if (hostEntry.AddressList[i].AddressFamily==AddressFamily.InterNetwork) 
        
            localAddress = hostEntry.AddressList[i];
    }
    ...
    try
    {
        if(mListenerSocket==null)
            mListenerSocket=new Socket(AddressFamily.InterNetwork, 
                SocketType.Stream, ProtocolType.Tcp);
        IPEndPoint localIP = new IPEndPoint(localAddress, mListenPort);
        mListenerSocket.Bind(localIP);
        //the best value to use here depends on each person alone
        mListenerSocket.Listen(50); 
        mListenerSocket.BeginAccept(new AsyncCallback(OnHandleClientConnection), null);
    }
    catch ...
    ...
}