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我在 C# 中运行 TCP 服务器。该程序似乎为新客户端运行并保持（它在 TcpClient 客户端 = this.tcpListener.AcceptTcpClient(); 上停止）等待新连接。但是，如果我检查网络（使用 netstat 命令），服务器没有在监听，这意味着没有运行。我也尝试了不同的端口，但我想端口 80 应该更适合测试（我也尝试过其他端口，但都没有工作）。我的代码有什么问题？也许操作系统阻止了服务器？

namespace TCPServer
{
    class TestClass
    {
        static void Main(string[] args)
        {
            Server TCPServer = new Server();
            // Display the number of command line arguments:
            System.Console.WriteLine(args.Length);
        }
    }

    class Server
    {
        private TcpListener tcpListener;
        private Thread listenThread;

        public Server()
        {
            this.tcpListener = new TcpListener(IPAddress.Any, 80);
            this.listenThread = new Thread(new ThreadStart(ListenForClients));
            this.listenThread.Start();
            System.Console.WriteLine("Server started");
        }

        //starts the tcp listener and accept connections
        private void ListenForClients()
        {
            this.tcpListener.Start();
            System.Console.WriteLine("Listener started");

            while (true)
            {
                System.Console.WriteLine("Accepting Clients");
                //blocks until a client has connected to the server
                TcpClient client = this.tcpListener.AcceptTcpClient();
                System.Console.WriteLine("Client connected");

                //create a thread to handle communication 
                //with connected client
                Thread clientThread = new Thread(new ParameterizedThreadStart(HandleClientComm));
                clientThread.Start(client);
            }
        }

        //Read the data from the client
        private void HandleClientComm(object client)
        {
            TcpClient tcpClient = (TcpClient)client; //start the client
            NetworkStream clientStream = tcpClient.GetStream(); //get the stream of data for network access

            byte[] message = new byte[4096];
            int bytesRead;

            while (true) 
            {
                bytesRead = 0;

                try
                {
                    //blocks until a client sends a message
                    bytesRead = clientStream.Read(message, 0, 4096);
                }
                catch
                {
                    //a socket error has occured
                    break;
                }

                if (bytesRead == 0) //if we receive 0 bytes
                {
                    //the client has disconnected from the server 
                    break;
                }

                //message has successfully been received
                ASCIIEncoding encoder = new ASCIIEncoding();
                System.Diagnostics.Debug.WriteLine(encoder.GetString(message, 0, bytesRead));

                //Reply
                byte[] buffer = encoder.GetBytes("Hello Client!");
                clientStream.Write(buffer, 0, buffer.Length);
                clientStream.Flush();
            }

            tcpClient.Close();
        }

    }
}

更新： 我将应用程序配置为获得防火墙豁免。我在windows7中运行。我还检查了端口 3000 并且没有在该端口上监听。我使用 netstat 输出来确定它是否在监听。

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