C# Timer for Millisecond Waits

Question

Every n*x milliseconds I perform an action where n = 0, 1, 2, ...; x is some increment.

Example - every 25 milliseconds I perform a calculation.

This action

Answer 1

At 25ms, you may be the wrong side of the resolution of your available timers in .Net.

However - as a general solution I'd probably attempt this a different way to your "do calculation..wait until 25ms has passed" approach.

A better way may well be to use a System.Timers.Timer, on a 25ms trigger, to trigger the calculation.

var timer = new Timer(25);
timer.Elapsed += (sender, eventArgs) =>
                     {
                         DoCalc();
                     };
timer.Start();

In the above example, a DoCalc method will be called every 25 ms (timer resolution issues notwithstanding). You would need to consider what to do if your calculation overran it's allotted time though. As it stands, the above code would allow a second calculation to start, even if the previous had not completed.