DateTime GetTime(double timeStamp)        {            DateTime dtStart = TimeZone.CurrentTimeZone.ToLocalTime(new DateTime(1970, 1, 1));            timeStamp = timeStamp * 10000;            long lTime = Convert.ToInt64(timeStamp);            //            long lTime = long.Parse(Convert.ToInt64(timeStamp)+"0000");            TimeSpan toNow = new TimeSpan(lTime);            return dtStart.Add(toNow);        }

　　   MessageBox.Show(GetTime(1508381207810.627).ToString("yyyy-MM-dd HH:mm:ss fff") + "");

 <script type="text/javascript">

        window.onload = function () {

            var t1 = 1508381207810.627;

            var dt = new Date(t1);

            alert(Date.parse(dt));