Reboot/ Shutdown / Suspend on Windows8 By using C#

reboot.cs

using System.Diagnostics;

namespace Reboot
{
    class Program
    {
        static void Main(string[] args)
        {
            ProcessStartInfo psi = new ProcessStartInfo();
            psi.FileName = "shutdown.exe";
            psi.Arguments = "-r -f -t 0";
            psi.CreateNoWindow = true;
            Process p = Process.Start(psi);
        }
    }
}

shutdown.cs

using System.Diagnostics;

namespace Shutdown
{
    class Program
    {
        static void Main(string[] args)
        {
            ProcessStartInfo psi = new ProcessStartInfo();
            psi.FileName = "shutdown.exe";
            psi.Arguments = "-s -f -t 0";
            psi.CreateNoWindow = true;
            Process p = Process.Start(psi);
        }
    }
}

suspend.cs

using System.Windows.Forms;

namespace Suspend
{
    class Program
    {
        static void Main(string[] args)
        {
            Application.SetSuspendState(PowerState.Suspend, false, false);
        }
    }
}