[DllImport("kernel32.dll")]

        private static extern bool SetLocalTime(ref Systemtime time);

        [StructLayout(LayoutKind.Sequential)]

        private struct Systemtime

        {

            public short year;

            public short month;

            public short dayOfWeek;

            public short day;

            public short hour;

            public short minute;

            public short second;

            public short milliseconds;

        }

        /// <summary>

        /// 设置系统时间

        /// </summary>

        /// <param name="dt">需要设置的时间</param>

        /// <returns>返回系统时间设置状态，true为成功，false为失败</returns>

        public static bool SetLocalDateTime(DateTime dt)

        {

            Systemtime st;

            st.year = (short)dt.Year;

            st.month = (short)dt.Month;

            st.dayOfWeek = (short)dt.DayOfWeek;

            st.day = (short)dt.Day;

            st.hour = (short)dt.Hour;

            st.minute = (short)dt.Minute;

            st.second = (short)dt.Second;

            st.milliseconds = (short)dt.Millisecond;

            bool rt = SetLocalTime(ref st);

            return rt;

        }

        public static DateTime GetDateTime(long timeStamp)

        {

            return new DateTime(1970, 1, 1).AddSeconds(timeStamp).ToLocalTime();

        }

        public static bool GetInternetTime(string url, out DateTime dt, out string errMsg)

        {

            dt = DateTime.MinValue;

            var startDt = DateTime.Now;

            var port = 13;

            var socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp) { ReceiveTimeout = 2000 };

            try

            {

                var iphostinfo = Dns.GetHostEntry(url);

                var ip = iphostinfo.AddressList[0];

                var ipe = new IPEndPoint(ip, port);

                var iar = socket.BeginConnect(ipe, null, null);

                if (!iar.AsyncWaitHandle.WaitOne(5000))

                {

                    errMsg = "连接超时" + url;

                    return false;

                }

                var recvBuffer = new byte[1024];

                var sb = new StringBuilder();

                var myE = Encoding.UTF8;

                int nBytes;

                while ((nBytes = socket.Receive(recvBuffer, 0, 1024, SocketFlags.None)) > 0)

                {

                    sb.Append(myE.GetString(recvBuffer, 0, nBytes));

                }

                var o = sb.ToString().Split(' ');

                TimeSpan ts = DateTime.Now - startDt;

                var setDt = Convert.ToDateTime(o[1] + " " + o[2]).Subtract(-ts); // 减去中途消耗的时间

                dt = setDt.ToLocalTime();

                Console.WriteLine(@"服务器：{0}时间：{1}", url, setDt);

                errMsg = "";

                return true;

            }

            catch (Exception ex)

            {

                errMsg = ex.Message;

                return false;

            }

            finally

            {

                socket.Close();

            }

        }