To runbackground service Breakpoint not hitting dispatcherTimer_Tick

dispatcherTimer.Tick += dispatcherTimer_Tick;
   dispatcherTimer.Interval = new TimeSpan(0, 0, 10); // TimeSpan for 10 secs

async void dispatcherTimer_Tick(object sender, object e)

public class BackGroundService
 {
      DispatcherTimer dispatcherTimer;

 public void DispatcherTimerSetup(HttpClient httpClient, string lati, string longi, string UserId)
 {
   dispatcherTimer = new DispatcherTimer();
   dispatcherTimer.Tick += dispatcherTimer_Tick;
   dispatcherTimer.Interval = new TimeSpan(0, 0, 10); // TimeSpan for 10 secs
   if (!dispatcherTimer.IsEnabled)
   {
      dispatcherTimer.Start();
   }
 }
 async void dispatcherTimer_Tick(object sender, object e)
 {
  ILinkUser Objuser = new LinkUsers();
  await Objuser.LinkUsertoGroups(UserCookieWrapper.UserAccessToken, Latitude, Longitude, UserId);
  await Objuser.LinkDeptUsertoSGroups(UserCookieWrapper.UserAccessToken, Latitude, Longitude, UserId);
 }
}