using System.Diagnostics;//引入Process 类

private Process[] MyProcesses;

MyProcesses = Process.GetProcessesByName("SajetManager");//需要监控的程序名，该方法带出该程序所有用到的进程 foreach (Process myprocess in MyProcesses) {     textBox1.Text += myprocess.ProcessName + "\r\n";     if (myprocess.ProcessName.ToLower() == "sajetmanager")     {         MessageBox.Show("SajetManager");         myprocess.EnableRaisingEvents = true;//设置进程终止时触发的时间         myprocess.Exited += new EventHandler(myprocess_Exited);//发现外部程序关闭即触发方法myprocess_Exited     } }   private void myprocess_Exited(object sender, EventArgs e)//被触发的程序 {     MessageBox.Show("SajetManager close"); }