源码：

private void button1_Click(object sender, EventArgs e)
        {
            Task t = new Task(() =>
            {
                foreach (string item in urls)
                {
                    wb_browser.Url = new Uri(item);
                    while (!alreadyGetUrl) { }//等待
                    alreadyGetUrl = false;
                }
            });
            t.ContinueWith(task =>
            {
                if (task.Status == TaskStatus.Faulted)
                {
                    textBox1.Invoke(new Action(() =>
                    {
                        textBox1.AppendText(task.Exception.InnerException.Message + "\r\n");
                    }));
                }
            }, TaskContinuationOptions.OnlyOnFaulted);
            t.Start();
        }

红色的这一行会报出一个异常，问题是为什么用于输出异常的延续任务只在调试的时候起作用，不调试运行却不起作用？？