Handle leak in C#'s Task class??

static void Main (string[]args)
    {
        var tasks = new List <Task <int >>();

        Console.WriteLine("Start");
        Console.ReadLine(); // The number of handle is 180

        // Define a delete that prints and returns the system tick count
        Func<object,int>action=(object objectj)=>
        {
            inti=(int)obj;

            // Make each thread sleep a different time in order to return a different tick count
            Thread.Sleep(i%100);

            Console.WriteLine("{0}", i);
            returni;
        };

        // Construct started tasks
        for (inti=0; i<5000;i++)
        {
            int index=i;
            tasks.Add (Task<int>.Factory.StartNew(action, index));
        }

        Console.WriteLine("Add end");
        Console.ReadLine(); // The number of handle is 312

        // Wait for all the tasks to finish.
        Task.WaitAll(tasks.ToArray());

        // We should never get to this point
        Console.WriteLine("WaitAll() has not done exceptions.THIS WAS NOT EXPECTED.");

        Console.WriteLine ("Test END");
        Console.ReadLine(); // The number of handle is 312

    }