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);                }            }        }