public class TaskManager
    {
        private int currentCount = 0;

        public void Run()
        {
            Console.WriteLine("Starting Task manager");
            Task task = Task.Factory.StartNew(()=>SampleTask(GetCounter()));
            Task.WaitAll(new[] {task});

        }


        private void SampleTask(int taskId)
        {
            Console.WriteLine("Task {0} started", taskId);
            Random random = new Random();

            DoAckermannFunction(3,10);

            int count = random.Next(4);
            Console.WriteLine("Task {0} generate {1} new tasks", taskId, count);
            for (int i = 0; i < count; i++)
            {
                Task.Factory.StartNew(() => SampleTask(GetCounter()));
            }
            Console.WriteLine("Task {0} finished", taskId);
        }

        //http://en.wikipedia.org/wiki/Ackermann_function
        public static int DoAckermannFunction(int m, int n)
        {
            if (m == 0)
                return n + 1;
            if (m > 0 && n == 0)
            {
                return DoAckermannFunction(m - 1, 1);
            }
            if (m > 0 && n > 0)
            {
                return DoAckermannFunction(m - 1, DoAckermannFunction(m, n - 1));
            }
            return 0;
        }

        private int GetCounter()
        {
            lock (this)
            {
                int count = currentCount;
                currentCount++;
                return count;
            }
        }
    }