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C#监控程序启动和关闭

using System;

using System.Collections.Generic;
using System.Text;
using System.Diagnostics;
using System.Threading;
namespace ProcessListener
{
    class Program
    {
        static void Main(string[] args)
        {
            for (; ; )
            {
                bool isNotePadStart = false;//标识记事本进程是否启动
                bool isExplorerStart = false;//标识explorer进程是否启动
                Process[] processes = Process.GetProcesses();//获取所有进程信息
                for (int i = 0; i < processes.Length; i++)
                {
                    if (processes[i].ProcessName.ToLower() == "notepad")
                    {
                        Console.WriteLine("找到记事本进程！即将关闭explorer进程");
                        // Thread.Sleep(1000);
                        isNotePadStart = true;
                        for (int j = 0; j < processes.Length; j++)
                        {
                            if (processes[j].ProcessName.ToLower() == "explorer")
                            {
                                try
                                {
                                    processes[j].Kill();
                                }
                                catch (Exception)
                                {
                                    Console.WriteLine("进程访问失败！");
                                }
                                Console.WriteLine("已关闭explorer.exe！");
                            }
                        }
                    }
                    if (processes[i].ProcessName.ToLower() == "explorer")
                    {
                        isExplorerStart = true;
                    }
                }
                if (!isNotePadStart && !isExplorerStart)
                {
                    Process.Start("explorer.exe");
                    isNotePadStart = true;
                }
            }
        }
    }
}