.NET 6新特性试用Timer类之PeriodicTimer 

System.Threading.Timer
System.Timers.Timer
System.Web.UI.Timer
System.Windows.Forms.Timer
System.Windows.Threading.DispatcherTimer

Timer timer = new Timer(delegate
{
    Thread.Sleep(3000);
    Console.WriteLine($"Timer Thread: {Thread.CurrentThread.ManagedThreadId}");
    Console.WriteLine($"{DateTime.Now.Second} Timer tick");
},null,0,1000
);

//间隔时间1秒
using (var timer = new PeriodicTimer(TimeSpan.FromSeconds(1)))
{
    //在到达指定周期后执行方法
    while (await timer.WaitForNextTickAsync())
    {
        await Task.Delay(3000);
 
        Console.WriteLine($"Timer Thread: {Thread.CurrentThread.ManagedThreadId}");
        Console.WriteLine($"{DateTime.Now.Second} PeriodicTimer tick");
    }
}

//创建CancellationTokenSource，指定在3秒后将被取消
var cts = new CancellationTokenSource(TimeSpan.FromSeconds(3));

using (var timer = new PeriodicTimer(TimeSpan.FromSeconds(1)))
{
    while (await timer.WaitForNextTickAsync(cts.Token))
    {
        Console.WriteLine($"{DateTime.Now.Second} PeriodicTimer tick");
    }
}

var cts = new CancellationTokenSource();

using (var timer = new PeriodicTimer(TimeSpan.FromSeconds(1)))
{
    int count = 0;
    while (await timer.WaitForNextTickAsync(cts.Token))
    {
        if (++count == 3)
        {
            //执行3次后取消
            cts.Cancel();
        }
        Console.WriteLine($"{DateTime.Now.Second} PeriodicTimer tick");
    }
}

using (var timer = new PeriodicTimer(TimeSpan.FromSeconds(1)))
{
    int count = 0;
    while (await timer.WaitForNextTickAsync())
    {
        if (++count == 3)
        {
            //执行3次后取消
            timer.Dispose();
        }
        Console.WriteLine($"{DateTime.Now.Second} PeriodicTimer tick");
    }
}