C# WebService中任务处理线程创建子线程后

        protected void WriteLog(string message)
        {
            lock (lockObject)
            {
                var file = System.IO.File.AppendText("C:\\log.txt");
                file.WriteLine(message);
                file.Close();
            }
        }

        protected void asyctest(int threadid)
        {

            this.WriteLog(string.Format("主线程({0})的子线程({1})开始", threadid, AppDomain.GetCurrentThreadId()));

            System.Threading.Thread.Sleep(10000);

            ProcessThread thread = this.GetThreadbyID(threadid);

            this.WriteLog(string.Format("主线程({0}: state: {1})的子线程({2})结束", threadid, thread == null ? -1 : (int)thread.ThreadState, AppDomain.GetCurrentThreadId()));

        }

        protected ProcessThread GetThreadbyID(int id)
        {
            foreach (ProcessThread item in System.Diagnostics.Process.GetCurrentProcess().Threads)
            {
                if (item.Id == id)
                {
                    return item;
                }
            }

            return null;
        }

        protected delegate void delegatetest(int threadid);

        [WebMethod]
        public void test()
        {
            this.WriteLog(string.Format("主线程({0})开始", AppDomain.GetCurrentThreadId()));

            for (int i = 0; i < 10; i++)
            {
                delegatetest currentDaliyCollect = new delegatetest(asyctest);
                IAsyncResult iADaliyCollect = currentDaliyCollect.BeginInvoke(AppDomain.GetCurrentThreadId(), null, null);
                if (iADaliyCollect.IsCompleted)
                {
                    currentDaliyCollect.EndInvoke(iADaliyCollect);
                }

            }
        }

　　

结论：

C# WebService中任务处理线程创建子线程后，此任务处理线程并没有退出销毁，而是ThreadState切换成Wait状态，所以子线程也不会被中止，而得以继续执行。

本来是想验证，父线程退出后，子线程是否会被强制中止。时间关系没有验证，至少验证了在webservice，不用担心在rpc方法中创建的子线程会被中止。