How to measure time in millisecond precision by thread

Question

I need to measure an event time precisely (suppose the time between two clicks). I used a timer and set the interval to "1" and a counter inside Tick event. The problem is since there are a lot of lines in my code the Tick event does not actually happen every 1ms (maybe every 8ms or more). Is there any way to use a thread and run a 1ms-timer independently in it?

Answer 1

        //start
        long start = DateTime.Now.Ticks;

        //to do something
        //...

        //end
        long end = DateTime.Now.Ticks;
        long delta = end - start;

Answer 2

var stopWatch = Stopwatch.StartNew();

// do something

stopWatch.Stop();

Console.WriteLine(stopWatch.ElapsedMilliseconds);