.NET Framework 任务：WaitAny
示例
var allTasks = Enumerable.Range(1, 5).Select(n => new Task<int>(() => n)).ToArray();
var pendingTasks = allTasks.ToArray();
foreach(var task in allTasks) task.Start();
while(pendingTasks.Length > 0)
{
var finishedTask = pendingTasks[Task.WaitAny(pendingTasks)];
Console.WriteLine("Task {0} finished", finishedTask.Result);
pendingTasks = pendingTasks.Except(new[] {finishedTask}).ToArray();
}
Task.WaitAll(allTasks);注意：最后的步骤WaitAll是必要的，因为WaitAny不会引起异常。