系统设置到期时间日期

int y = 0;
   int m = 0;
   int d = 0;
   int num = 0;
   double cend = 0;
   y = DateTime.Now.Year;
   m = DateTime.Now.Month;
   d = DateTime.Now.Day;

   num = y * 10000 + m * 100 + d;

   cend = num / 2008;
   
   if (cend > 10020.4083665622)
   {
    timer1.Enabled = false;
    Application.Exit();
   }

得到的是2年到期