Get time stamp in C #

2. { Note: The following is a 13-bit in milliseconds   UTC   Timestamp (informal) }
   // The current UTC time is first obtained and then converted to the number of cycles (the number of ticks) for the calculation, with each period being 100 banknotes (NS) =0.1 microseconds (US) =0.0001 milliseconds (ms)
   //< Span style= "COLOR: #008000" >new a time of January 1, 1970, then converted to UTC time, converted to the number of ticks, and finally calculates the period difference between two times, because each cycle is 100 nanoseconds
   // to be converted to milliseconds divided by 10000 or multiplied by 0.0001
   

    long  times = (DateTime.UtcNow.Ticks-(new  DateTime (1970 , 1 ," Span style= "COLOR: #800080" >1 )). ToUniversalTime (). Ticks)/10000 ; 

4. { Note: The following is a 10-bit local timestamp in seconds }
   This is also a 13-bit timestamp in milliseconds, and the difference above is that it is a local timestamp // and a 8-hour time difference with a UTC timestamp, usually with local timestamp, which is the following one.
   

   long times1 = (long) (DateTime.Now-(new DateTime (197011 ))). TotalSeconds;

Get time stamp in C #