public class SendMqService
{
        private static bool isExcute = true;
        private static HttpListener listener = new HttpListener();
        public static void Start()
        {
            System.Threading.ThreadPool.QueueUserWorkItem(w => Excute());//單獨開啟一個線程執行監聽消息
        }

        
 
private static void Excute()
        {
            if (HttpListener.IsSupported)
            {
                if (!listener.IsListening)
                {
                    listener.Prefixes.Add(AppSetingHelper.GetValue("SendMqAddress")); //添加需要監聽的url,如：http://192.016.0.1:8888
                    listener.Start(); //
 
開始監聽端口，接收客戶端請求
                }
                while (isExcute)
                {
                    try
                    {
                        //阻塞主函數至接收到一個客戶端請求為止
                        HttpListenerContext context = listener.GetContext();
                        HttpListenerRequest request 
 
= context.Request;
                        HttpListenerResponse response = context.Response;

                        var reader = new StreamReader(request.InputStream);
                        var mqMsg = reader.ReadToEnd();
                        var responseString = string.Empty;

　　　　　　　　　　　　　　// 執行其他業務邏輯
　　　　　　　　　　　　　　//*****************
                        
                        responseString = JsonConvert.SerializeObject(new { code = 0, msg = "發送成功" });                       
                        byte[] buffer = System.Text.Encoding.UTF8.GetBytes(responseString);
                        //對客戶端輸出相應信息.
                        response.ContentLength64 = buffer.Length;
                        using (System.IO.Stream output = response.OutputStream)
                        {
                            output.Write(buffer, 0, buffer.Length);
                        }
                    }
                    catch (Exception exceotion)
                    {
                        Logger.Error("處理消息異常", exceotion);
                    }
                }
            }
            else
            {
                Logger.Info("系統不支持HttpListener");
            }            
        }

        public static void Stop()
        {
            isExcute = false;
            if (listener.IsListening)
                listener.Stop();
        }
    }
}

服務啟動時需要啟動監聽，服務停止時需要停止監聽

        protected override void OnStart(string[] args)
        {
            SendMqService.Start();
        }

        protected override void OnStop()
        {
            //停止監聽
            SendMqService.Stop();
        }

windows服務中對外提供API接口