【官方介绍】：Windows XP SP2 or Server 2003 is required to use the HttpListener class.

在win10上执行没问题，在winform和console开启一个小型的http请求(小型API)

    /// <summary>
    /// http 监听服务
    /// </summary>
    public class HttpListenHelper
    {
        /// <summary>
        /// 监听服务
        /// </summary>
        private static HttpListener _httpListener;
        /// <summary>
        /// 构造函数
        /// </summary>
        public HttpListenHelper()
        {
            Start();
        }
        /// <summary>
        /// 开启监听
        /// </summary>
        public void Start()
        {
            if (_httpListener == null || !_httpListener.IsListening)
            {
				//获取本机IP
                IPHostEntry ipEntry = Dns.GetHostEntry(Dns.GetHostName());
                string strIp = "localhost";
                foreach (var ip in ipEntry.AddressList)
                {
                    if (!ip.IsIPv6LinkLocal)
                    {
                        strIp = ip.ToString();
                        break;
                    }
                }
				// 结尾别少了'/'
                string _url = $"http://{strIp}:9999/";
                _httpListener = new HttpListener();
                _httpListener.Prefixes.Add(_url);
                _httpListener.Start();
                _httpListener.BeginGetContext(GetContextCallBack, _httpListener);
            }
        }
        /// <summary>
        /// 回调
        /// </summary>
        /// <param name="ar"></param>
        /// <exception cref="ArgumentException"></exception>
        private void GetContextCallBack(IAsyncResult res)
        {
            try
            {
                HttpListener _listener = res.AsyncState as HttpListener;
                if (_listener.IsListening)
                {
                    HttpListenerContext context = _listener.EndGetContext(res);
                    _listener.BeginGetContext(GetContextCallBack, _listener); // 继续建立请求回调

					//解析http请求
                    HttpListenerRequest request = context.Request;
					string rawUrl = request.RawUrl.ToLower();
					//获取传递的请求数据
					var reader = new StreamReader(request.InputStream, Encoding.UTF8);
					string json = reader.ReadToEnd();
					// 获取返回的数据
					object? obj =  GetTable();
					OutResult(context, obj);

                }
            }
            catch (Exception ex)
            {
                WriteLog.Write(ex.Message, ex.StackTrace!);
            }
        }
        /// <summary>
        /// 输出结果
        /// </summary>
        /// <param name="context"></param>
        /// <param name="json"></param>
        /// <param name="intStatus "></param>
        private void OutResult(HttpListenerContext context, object obj, int intStatus = 200)
        {
            HttpListenerResponse response = context.Response;
            response.StatusCode = intStatus;
            response.ContentType = "application/json;charset=UTF-8";
            response.ContentEncoding = Encoding.UTF8;
            response.AppendHeader("Content-Type", "application/json;charset=UTF-8");
            string json = JsonSerializer.Serialize(obj);
            using (StreamWriter writer = new StreamWriter(response.OutputStream, Encoding.UTF8))
            {
                writer.Write(json);
                writer.Close();
                response.Close();
            }
        }
        /// <summary>
        /// 停止
        /// </summary>
        public void Stop()
        {
            if (_httpListener != null && _httpListener.IsListening)
            {
                _httpListener.Stop();
                _httpListener.Close();
                _httpListener = null!;
            }
        }
        ~HttpListenHelper()
        {
            Stop();
        }
    }