C#winform程序关闭计算机的正确姿势

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/// <summary> /// 计算机电源控制类 /// </summary> public class EnvironmentCheckClass {     [DllImport("user32.dll")]     static extern bool ExitWindowsEx(ExitWindows uFlags, ShutdownReason dwReason);     [DllImport("kernel32.dll", ExactSpelling = true)]     internal static extern IntPtr GetCurrentProcess();       [DllImport("advapi32.dll", ExactSpelling = true, SetLastError = true)]     internal static extern bool OpenProcessToken(IntPtr h, int acc, ref IntPtr phtok);       [DllImport("advapi32.dll", SetLastError = true)]     internal static extern bool LookupPrivilegeValue(string host, string name, ref long pluid);       [DllImport("advapi32.dll", ExactSpelling = true, SetLastError = true)]     internal static extern bool AdjustTokenPrivileges(IntPtr htok, bool disall,  ref TokPriv1Luid newst, int len, IntPtr prev, IntPtr relen);       [DllImport("user32.dll", ExactSpelling = true, SetLastError = true)]     internal static extern bool ExitWindowsEx(int flg, int rea);         [StructLayout(LayoutKind.Sequential, Pack = 1)]     internal struct TokPriv1Luid     {         public int Count;         public long Luid;         public int Attr;     }       internal const int SE_PRIVILEGE_ENABLED = 0x00000002;     internal const int TOKEN_QUERY = 0x00000008;     internal const int TOKEN_ADJUST_PRIVILEGES = 0x00000020;     internal const string SE_SHUTDOWN_NAME = "SeShutdownPrivilege";       public enum ExitWindows : uint     {         LogOff = 0x00,      //注销         ShutDown = 0x01,    //关机         Reboot = 0x00000002,  //重启         Force = 0x04,         PowerOff = 0x08,         ForceIfHung = 0x10     }     public enum ShutdownReason : uint     {         MajorApplication = 0x00040000,         MajorHardware = 0x00010000,         MajorLegacyApi = 0x00070000,         MajorOperatingSystem = 0x00020000,         MajorOther = 0x00000000,         MajorPower = 0x00060000,         MajorSoftware = 0x00030000,         MajorSystem = 0x00050000,         MinorBlueScreen = 0x0000000F,         MinorCordUnplugged = 0x0000000b,         MinorDisk = 0x00000007,         MinorEnvironment = 0x0000000c,         MinorHardwareDriver = 0x0000000d,         MinorHotfix = 0x00000011,         MinorHung = 0x00000005,         MinorInstallation = 0x00000002,         MinorMaintenance = 0x00000001,         MinorMMC = 0x00000019,         MinorNetworkConnectivity = 0x00000014,         MinorNetworkCard = 0x00000009,         MinorOther = 0x00000000,         MinorOtherDriver = 0x0000000e,         MinorPowerSupply = 0x0000000a,         MinorProcessor = 0x00000008,         MinorReconfig = 0x00000004,         MinorSecurity = 0x00000013,         MinorSecurityFix = 0x00000012,         MinorSecurityFixUninstall = 0x00000018,         MinorServicePack = 0x00000010,         MinorServicePackUninstall = 0x00000016,         MinorTermSrv = 0x00000020,         MinorUnstable = 0x00000006,         MinorUpgrade = 0x00000003,         MinorWMI = 0x00000015,         FlagUserDefined = 0x40000000,         FlagPlanned = 0x80000000     }       public void ReStartComputer()     {         System.Threading.Thread Restart = new System.Threading.Thread(ReStart);         Restart.Start();     }       private void ReStart()     {         try         {             System.Threading.Thread.Sleep(1000);             bool ok;             TokPriv1Luid tp;             IntPtr hproc = GetCurrentProcess();             IntPtr htok = IntPtr.Zero;             ok = OpenProcessToken(hproc, TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, ref htok);             tp.Count = 1;             tp.Luid = 0;             tp.Attr = SE_PRIVILEGE_ENABLED;             ok = LookupPrivilegeValue(null, SE_SHUTDOWN_NAME, ref tp.Luid);             ok = AdjustTokenPrivileges(htok, false, ref tp, 0, IntPtr.Zero, IntPtr.Zero);             ok = ExitWindowsEx(ExitWindows.Reboot, ShutdownReason.MinorOther);         }         catch         { }     }       public void ComputerPowerOff()     {         System.Threading.Thread PowerOff = new System.Threading.Thread(PCPowerOff);         PowerOff.Start();     }       private void PCPowerOff()     {         try         {             System.Threading.Thread.Sleep(1000);              bool ok;             TokPriv1Luid tp;             IntPtr hproc = GetCurrentProcess();             IntPtr htok = IntPtr.Zero;             ok = OpenProcessToken(hproc, TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, ref htok);             tp.Count = 1;             tp.Luid = 0;             tp.Attr = SE_PRIVILEGE_ENABLED;             ok = LookupPrivilegeValue(null, SE_SHUTDOWN_NAME, ref tp.Luid);             ok = AdjustTokenPrivileges(htok, false, ref tp, 0, IntPtr.Zero, IntPtr.Zero);             ok = ExitWindowsEx(ExitWindows.PowerOff, ShutdownReason.MajorHardware);         }         catch         { }     } }