C#winform程序关闭计算机的正确姿势

    /// 

    /// 计算机电源控制类
    /// 
    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
            { }
        }
    }