如何知道组中的最后一次异步调用何时完成？

Question

If I'm running a series of async Tasks in C#, is there a reliable way for me to know when the last of the set has completed?

Note: The number of Tasks I'm creating is not known ahead of time, so I'll only know when I'm done creating them after an external condition is satisfied.

Answer 1

Task.WhenAll(IEnumerable<Task>)创建一个任务，该任务在参数列表中的所有任务完成时完成。