C#定时器Timer实现精确到1-2毫秒以内

 private Timer timer;

 private void TimerTest_OnClick(object sender, RoutedEventArgs e)
 {
     timer = new Timer();
     timer.Interval = 1;
     timer.Elapsed += Timer_Elapsed;
     timer.Start();
 }

 private void Timer_Elapsed(object? sender, ElapsedEventArgs e)
 {
     Console.WriteLine(DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss fff"));
 }

using Timer = System.Timers.Timer;

private CancellationTokenSource tokenSource = new CancellationTokenSource();

private void SelfAutoTimer()
{
    Task.Run(() =>
    {
        var current = DateTime.Now;

        while (!tokenSource.IsCancellationRequested)
        {
            var temp = DateTime.Now;
            if ((temp - current).TotalMilliseconds >=1)
            {
                Console.WriteLine(DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss fff"));
                current = temp;
            }
        }
    });
}