How to run a thread until a condition becomes true in c#

Question

I am writing a program to send SMS every 5 minutes. I want to stop this when the system time is 6 PM. How can I do that? This is my current code. I want to modify this accordin

Answer 1

Generally never use Sleep is bad idea , use timer instead:

System.Timers.Timer SendSMS = new System.Timers.Timer();        
SendSMS.Interval = 300000;  ///300000ms=5min    
SendSMS.Elapsed += new System.Timers.ElapsedEventHandler(SendSMS_Elapsed);
SendSMS.Enabled=true;

 void SendSMS_Elapsed(object sender, System.Timers.ElapsedEventArgs e)
        {
            sms.SendSMS();
        }     

Add a second timer to check the time and stop when is 6pm:

 System.Timers.Timer StopSendSMS = new System.Timers.Timer();        
    StopSendSMS.Interval = 100;      
    StopSendSMS.Elapsed += new System.Timers.ElapsedEventHandler( StopSendSMS_Elapsed);
    StopSendSMS.Enabled=true;


 void StopSendSMS_Elapsed(object sender, System.Timers.ElapsedEventArgs e)
            {
                  if (int(DateTime.Now.Hour)==18))
                   {
                     SendSMS.Enabled=false;
                     StopSendSMS.Enabled=false; ///no need to check anymore
                   }

            }