话不多说，请看代码：

using System;using System.Collections.Generic;using System.Text;namespace NET.MST.Sixth.Reenter{ class Reenter { //用来造成线程同步问题的静态成员 private static int TestInt1=0; private static int TestInt2 = 0; private static object locko = new object(); static void Main(string[] args) { Console.WriteLine("System.Timers.Timer 回调方法重入测试："); TimersTimerReenter(); //这里确保已经开始的回调方法有机会结束 System.Threading.Thread.Sleep(2 * 1000); Console.WriteLine("System.Threading.Timer 回调方法重入测试："); ThreadingTimerReenter(); Console.Read(); } /// <summary> /// 展示System.Timers.Timer的回调方法重入 /// </summary> static void TimersTimerReenter() { System.Timers.Timer timer = new System.Timers.Timer(); timer.Interval = 100; //100毫秒 timer.Elapsed += TimersTimerHandler; timer.Start(); System.Threading.Thread.Sleep(2 * 1000); //运行2秒 timer.Stop(); } /// <summary> /// 展示System.Threading.Timer的回调方法重入 /// </summary> static void ThreadingTimerReenter() { //100毫秒 using (System.Threading.Timer timer = new System.Threading.Timer (new System.Threading.TimerCallback(ThreadingTimerHandler), null, 0, 100)) { System.Threading.Thread.Sleep(2 * 1000); //运行2秒 } } /// <summary> /// System.Timers.Timer的回调方法 /// </summary> /// <param name="sender"></param> /// <param name="args"></param> private static void TimersTimerHandler(object sender,EventArgs args) { lock (locko) { Console.WriteLine("测试整数：" + TestInt1.ToString()); //睡眠10秒，保证方法重入 System.Threading.Thread.Sleep(300); TestInt1++; Console.WriteLine("自增1后测试整数：" + TestInt1.ToString()); } } /// <summary> /// System.Threading.Timer的回调方法 /// </summary> /// <param name="state"></param> private static void ThreadingTimerHandler(object state) { lock (locko) { Console.WriteLine("测试整数：" + TestInt2.ToString()); //睡眠10秒，保证方法重入 System.Threading.Thread.Sleep(300); TestInt2++; Console.WriteLine("自增1后测试整数：" + TestInt2.ToString()); } } }}

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