WinForm implements the method of automatically closing the program without running for a period of time

using System;
using ;
using ;
using ;
using ;
using ;
using ;
using ;
using ;
using .X509Certificates;
using ;
namespace DemoDataGridView
{
 public partial class Form3 : Form, IMessageFilter
 {
  private int m_WaitMinute = 0;
   MyTimer;
  public Form3()
  {
   InitializeComponent();
   MyTimer = new Timer();
    = 1000;
    += new EventHandler(MyTimer_Tick);
    += new EventHandler(Application_Idle);
  }
  void MyTimer_Tick(object sender, EventArgs e)
  {
   if (m_WaitMinute < 60)
   {
     = true;
     = 10000; //10 seconds    m_WaitMinute += 1;
    //  = 1.0 - (m_WaitMinute / 60.0);
   }
   else
   {
     = false;
   }
  }
  void Application_Idle(object sender, EventArgs e)
  {
   if (m_WaitMinute == 0)
   {
    ("D:\\", ());
    ();
   }
   else
   {
    if (m_WaitMinute >= 6)
    {
     ("D:\\", ());
     ();
    }
   }
  }
  public bool PreFilterMessage(ref Message m)
  {
   if (m_WaitMinute != 0)
   {
    m_WaitMinute = 0;
     = false;
    return true;
   }
   return false;
  }
 }
}