c# - 来自线程的异常不会冒泡到主线程

Question

这里我开始一个任务:

System.Threading.Tasks.Task.Factory.StartNew( () =>
    RefreshCache(crmClientInfo)).ContinueWith(
        previous => RefreshCacheExceptionHandling(previous.Exception),
        TaskContinuationOptions.OnlyOnFaulted
    );

...这是我的 worker :

public void RefreshCache(CrmClientInfo _crmClientInfo)
{
    AsyncManager.OutstandingOperations.Increment();

    Timer timer = new Timer(10000);
    timer.Elapsed += delegate
    {
        throw new AggregateException("Timeout!");
    };
    timer.Start();

    OtherServices.RefreshCache(crmClientInfo);
    AsyncManager.OutstandingOperations.Decrement();
}

如果异常不是发生在计时器定义中而是发生在其他地方，则异常会正确地冒泡到 RefreshCacheExceptionHandling()。但是，如果它从计时器 (AgregateException("Timeout!");) 触发，则线程不会中断。 为什么？

Answer 1

The System.Threading.Timer class makes callbacks on a ThreadPool thread and does not use the event model at all.

查看文档，此处:http://msdn.microsoft.com/en-us/library/zdzx8wx8.aspx