title: How to recognize very short time difference?
body: <p>I am working on application that is testing human reaction time and I want it to be able to count the difference between reaction of one person and reaction of the other person. I tried to use timers but those standard timers in C# are not very effective and not really accurate, they can't count ~1ms difference, not even 5ms difference is accurate enough. Is there any way I could recognize the difference quite exactly? I could not really find something but I think that I could maybe take time of first reaction and then time of second reaction and get the difference but I did not manage to get exact time, is there any way to do that or should I use multimedia timer instead?
  (I am looking for simple solution..)</p>