Auto Off Automation

Cory wrote: I wrote an automation program to automatically turn off a light after 5 minutes.

/*
  This code is running one time when program is enabled
*/
public void Setup()  

{  
  
  EventHelper.ModuleChangedHandler((o, m, p) =>  
  {   
    // filter digital switch - change module address  
    if (m.Domain == Domains.MYSENSORS && m.Address == "N21S1" && p.Property == "Sensor.DigitalValue"){  
      DateTime t = DateTime.Now;
      
      // filter when switch on event   
      if (p.Value == "1") {  
        t = t.AddMinutes(5);
        Console.WriteLine("Starting 5 Minute Auto Off Timer");
        while (DateTime.Now < t) {
          Console.WriteLine("Sleeping 10 Seconds... {0} Minutes left", (t - DateTime.Now));
          System.Threading.Thread.Sleep(10000);  //Set an X Minute Delay
        }
        Console.WriteLine("Auto Off Entry Light");
        DriverHelper.ProcessCommad(Domains.MYSENSORS, "N21S1", "ControlOff", "");  //Entry Light
             
      }
      else {
        t = DateTime.Now;
      }
 
    }  
    return true;   
  });   

 
}  

/*
  This code is running periodically when program is enabled. 
  Cron job determine running period.
*/
public void Run()
{
}

I found that sleeping the thread for 5 minutes did not provide a very reliable automation. Has anyone else done an auto-off automation that works reliably?