C#, System.Timers.Timer, run every min in sync with system clock

Question

I am trying to get a timer run every minute in sync with the system clock (00:01:00, 00:02:00, 00:03:00, etc). Will the following code produce a stable timer? I've tried running it. The timer does precisely run every min. But the question is will it start to wander off, say, after several months?

private System.Timers.Timer timer;

public frmMain()
{
            timer = new System.Timers.Timer();
            timer.AutoReset = false;
            timer.Elapsed += new System.Timers.ElapsedEventHandler(timer_Elapsed);
            timer.Interval = GetInterval();
            timer.Start();
}

private void timer_Elapsed(object sender, System.Timers.ElapsedEventArgs e)
{
            //Do processing

            timer.Interval = GetInterval();
            timer.Start();

}
private double GetInterval()
{
            DateTime now = DateTime.Now;
            return ((60 - now.Second) * 1000 - now.Millisecond);
}

Answer 1

It won't.

DateTime.Now uses the system clock as the reference timer, so your timer will always stay in sync with it, modulus the few milliseconds of system clock resolution.