c# js 时间

 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));