Thread: Wait until x==true

Do you have to use the threadpool? What about something like this?

Code:

        static void Main(string[] args)
        {
            Thread thread1 = new Thread(DrawTopPixels);
            Thread thread2 = new Thread(DrawBottomPixels);

            thread1.Start();
            thread2.Start();

            thread1.Join();
            thread2.Join();

            Console.WriteLine("Both threads have terminated.");
        }

        private static void DrawTopPixels(object obj)
        {
            // Code to draw pixels
        }

        private static void DrawBottomPixels(object obj)
        {
            // Code to draw pixels
        }
    }