C# 任务设置超时取消

        public static async Task TaskTimeoutAfter(this Task task, int timeout)
        {
            using (var timeoutCancellationTokenSource = new CancellationTokenSource())
            {
                var completedTask = await Task.WhenAny(task, Task.Delay(timeout, timeoutCancellationTokenSource.Token));
                if (completedTask == task)
                {
                    timeoutCancellationTokenSource.Cancel();
                    return await task;
                }

                throw new TimeoutException("The operation has timed out");
            }
        }