Windows Service to run a function at specified time

Running a windows service on specific time and a given interval. The below service is scheduled to run between – 4.50 PM – 5.00 PM every day. The service will run for the interval of 15 minutes.

using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Diagnostics; using System.Linq; using System.ServiceProcess; using System.Text; using System.Threading.Tasks; using System.Windows.Forms; namespace EAdvicesServices {     partial class Service1 : ServiceBase     {         System.Timers.Timer timer1 = null;         public Service1()         {             InitializeComponent();             this.CanHandlePowerEvent = true;             this.CanHandleSessionChangeEvent = true;             this.CanPauseAndContinue = true;             this.CanShutdown = true;             this.CanStop = true;                     }         protected override void OnStart(string[] args)         {             // TODO: Add code here to start your service.             //For each process timer should be mentioned here.             double elapseTime = Convert.ToDouble("900000");             timer1 = new System.Timers.Timer(elapseTime);             timer1.Elapsed += new System.Timers.ElapsedEventHandler(timer1_Elapsed);             timer1.Start();                     }         protected override void OnStop()         {             // TODO: Add code here to perform any tear-down necessary to stop your service.             timer1.Stop();             timer1.Enabled = false;         }         protected void timer1_Elapsed(object source, System.Timers.ElapsedEventArgs aa)         {                         TimeSpan currentDate = DateTime.Now.TimeOfDay;             TimeSpan scheduleStartDate = DateTime.Parse("1/1/2013 04:50:00 PM").TimeOfDay;             TimeSpan scheduleEndDate = DateTime.Parse("1/1/2013 05:00:00 PM").TimeOfDay;             if ((TimeSpan.Compare(currentDate, scheduleStartDate) > 0) && (TimeSpan.Compare(currentDate, scheduleEndDate) < 0))             {                 RunServiceProgram();             }         }         private void RunServiceProgram()         {             //Write here you code to execute the program         }     } }