C# Task.Delay 简单测试

class TaskDelayTest
{
    Stopwatch sw = new Stopwatch();

    public void DoRun()
    {
        Console.WriteLine($"Caller：Before call.");
        ShowDelayAsync();
        //ShowDelay();
        Console.WriteLine($"Caller：After call.");
    }
    private async void ShowDelayAsync()
    {
        sw.Start();
        Console.WriteLine($"    延时前：{sw.ElapsedMilliseconds}");
        await Task.Delay(1000); // 不会阻塞当前线程
        Console.WriteLine($"    延时后：{sw.ElapsedMilliseconds}");
    }

    private async void ShowDelay()
    {
        sw.Start();
        Console.WriteLine($"    延时前：{sw.ElapsedMilliseconds}");
        await Task.Run(()=> Thread.Sleep(1000)); 
        Console.WriteLine($"    延时后：{sw.ElapsedMilliseconds}");
    }
}

class Program
{
    static void Main()
    {
        TaskDelayTest test = new TaskDelayTest();
        test.DoRun();

        Console.ReadKey();
    }
}

输出：

Caller：Before call.
    延时前：0
Caller：After call.
    延时后：1027

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参考：

《图解教程》