[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;        }        /// 
        /// 设置系统时间        /// 
        /// 需要设置的时间        /// 
     
      返回系统时间设置状态，true为成功，false为失败
             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();            }        }