简述System.Windows.Forms.Timer 与System.Timers.Timer用法区别

        /// <summary>
        /// windows定时器
        /// </summary>
        System.Windows.Forms.Timer _wTimer;
        /// <summary>
        /// 应用程序生成定时器
        /// </summary>
        System.Timers.Timer _tTimer;
        
        private void Form1_Load(object sender, EventArgs e)
        {
            _wTimer = new System.Windows.Forms.Timer();
            _wTimer.Interval = 500;//设置时间间隔500毫秒
            _wTimer.Tick += _wTimer_Tick;
            _wTimer.Start();//启动定时器


            _tTimer = new System.Timers.Timer();
            _tTimer.Interval = 500;//设置时间间隔500毫秒
            _tTimer.Elapsed += _tTimer_Elapsed;
            //_tTimer.Start();



        }
        void _tTimer_Elapsed(object sender, System.Timers.ElapsedEventArgs e)
        {
            Print("_tTimer_Elapsed" + _count.ToString());
            Thread.Sleep(2000);//休眠2秒
            _count++;
        }

        void _wTimer_Tick(object sender, EventArgs e)
        {
            Print("_wTimer_Tick" + _count.ToString());
            Thread.Sleep(2000);//休眠2秒
            _count++;
        }


        private void Print(string msg)
        {
            if (this.InvokeRequired)
            {
                this.BeginInvoke((Action)delegate() 
                {
                    textBox1.AppendText(msg + "\r\n");
                });
            }
            else
            {
                textBox1.AppendText(msg + "\r\n");
            }
        }