Thread.Sleep is actually used to block the thread Temporarily for an interval. Async CTP brings forth one probable alternative if you dont want to write yourself :
TaskEx.Delay(milliseconds)
Probably in next release it will be
Task.Delay(milliseconds)
This works little different as it can work with await, but you can easily put a Task.Wait to get similar result as Thread.Sleep.
Task t = TaskEx.Delay(500);
t.Wait()
is same as
Thread.Sleep(500)
Check my whole article
C# 5.0 vNext - New Asynchronous Pattern[
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