We have used DispatcherTimer for updating datetime in label in WPF Application.

Its tick event stopped working after exception.

DispatcherTimer timer = new DispatcherTimer();            
timer.Interval = TimeSpan.FromSeconds(1);
timer.Tick += new EventHandler(timer_Tick);
timer.Start();

We have added Dispactch undhandled exception to catch all unhandled exception.

this.Dispatcher.UnhandledException += new System.Windows.Threading.DispatcherUnhandledExceptionEventHandler(Dispatcher_UnhandledException);

Error call of DispatcherTimer tick event (devide by zero ). After exception application handled the call to UnhandledException & then stopped calling DispatcherTimer tick event.

void timer_Tick(object sender, EventArgs e)
        {
            ServerClock = ServerClock.AddSeconds(1);

            int a = 0;
            int i = 1 / a;

        }

What is stopping tick event to run in another tick?