core 异步阻塞

            Console.WriteLine(DateTime.Now);
            CancellationTokenSource cancellationTokenSource = new CancellationTokenSource(TimeSpan.FromSeconds(10));
            CancellationToken stoppingToken = cancellationTokenSource.Token;

            try
            {
                Task.Factory.StartNew(async () =>
                {
                    Console.WriteLine("before");
                    await Task.Delay(Timeout.Infinite, stoppingToken);
                    Console.WriteLine("after");
                }, stoppingToken, TaskCreationOptions.LongRunning, TaskScheduler.Current)
                .Unwrap().Wait();
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex);
            }

            Console.WriteLine(DateTime.Now);

可根据实际情况将Wait改为 async await