Timestamp conversion between js and c-sharp

JS timestamp to C# time, and then C# timestamp to JS time

Timestamp in JS

 var dt = new Date().getTime();//Time stamp 

C# timestamp turns time

            DateTime dtStart = TimeZone.CurrentTimeZone.ToLocalTime( new DateTime(1970, 1, 1));

            long lTime = long.Parse(dt + "0000");  //Under the explanation, the time format is 13 bits followed by 4 "0", if the time format is 10 bits followed by 7 "0", as for why I am not quite clear, is also the code conversion after someone else wrote 

            TimeSpan toNow = new TimeSpan(lTime);

            DateTime dtResult = dtStart.Add(toNow); //Get the converted time 

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C# time to timestamp

            System. DateTime startTime = TimeZone.CurrentTimeZone.ToLocalTime( new System. DateTime(1970, 1, 1, 0, 0, 0, 0));

            //intResult = (time- startTime).TotalMilliseconds;

DateTime dtResult//Getting time & NBSP;               < br / >
long t = (dtResult.Ticks - startTime.Ticks) / 10000;//Divide 10000 to 13 bits 

JS

       var d = new Date(data);  //Time stamp rotation time 

       alert(formatDate(d)); 

 //Format time 

 function    formatDate(now)   {    

        var   year=now.getFullYear();    

        var   month=now.getMonth()+1;    

        var   date=now.getDate();    

        var   hour=now.getHours();    

        var   minute=now.getMinutes();    

        var   second=now.getSeconds();    

        return   year+ "-"+month+ "-"+date+ "   "+hour+":" +minute+":" +second;    

    }  

The code is super simple, but it's all very useful