如何在C＃4.0中使任务进入睡眠状态（或延迟）？

Question

.NET 4.5中 有Task.Delay

在.NET 4.0中我该如何做？

Answer 1

您可以使用在4.0中Timer创建Delay方法：public static Task Delay(double milliseconds){&nbsp; &nbsp; var tcs = new TaskCompletionSource<bool>();&nbsp; &nbsp; System.Timers.Timer timer = new System.Timers.Timer();&nbsp; &nbsp; timer.Elapsed+=(obj, args) =>&nbsp; &nbsp; {&nbsp; &nbsp; &nbsp; &nbsp; tcs.TrySetResult(true);&nbsp; &nbsp; };&nbsp; &nbsp; timer.Interval = milliseconds;&nbsp; &nbsp; timer.AutoReset = false;&nbsp; &nbsp; timer.Start();&nbsp; &nbsp; return tcs.Task;}