Is there a better way in C# to round a DateTime to the nearest 5 seconds?

Question

I want to round a DateTime to the nearest 5 seconds. This is the way I\'m currently doing it but I was wondering if there was a better or more concise way?

Answer 1

The Ticks count of a DateTime represents 100-nanosecond intervals, so you can round to the nearest 5 seconds by rounding to the nearest 50000000-tick interval like this:

  DateTime now = DateTime.Now;
  DateTime rounded = new DateTime(((now.Ticks + 25000000) / 50000000) * 50000000);

That's more concise, but not necessarily better. It depends on whether you prefer brevity and speed over code clarity. Yours is arguably easier to understand.