How to keep track of background threads?

[somu0915]

I have two threads, one UI thread and one Background thread..

I want to keep a track of the background thread so that I may kill my UI thread (a tray icon) when the background thread has finished...

Please review my code for more details..

class Program
    {
        static void Main(string[] args)
        {
            Thread[] threads = new Thread[2];
            threads[0] = new Thread(new ThreadStart(UIMethod));
            threads[1] = new Thread(new ThreadStart(BackGroundMethod));
            threads[0].SetApartmentState(ApartmentState.STA);
            threads[0].Start();
            threads[1].Start();
            /*What should I write here so that I know when BackGroundMethod has finished, I can kill my system tray icon*/
        }
        public static void UIMethod()
        {
            /*Generate the system tray*/
               Tray obj = new Tray();	
	obj.GenerateTrayIcon();
	Application.Run();
        }
        public static void BackGroundMethod()
        {
            /*Do some heavy background work..*/
        }
    }

Any suggestions with some code would be highly appreciated..

Thanks.