Abort Completed Task

class Program
   {
       static void Main(string[] args)
       {
           System.Timers.Timer myTimer = new System.Timers.Timer();
           myTimer.Elapsed += new ElapsedEventHandler(OnTimer);
           myTimer.Interval = 1000;
           myTimer.Enabled = true;
           myTimer.AutoReset = false;
           Console.WriteLine(@"Press 'q' and 'Enter' to quit...");

           while (Console.Read() != 'q')
           {
               Thread.Sleep(1000);
           }
       }

       public static void OnTimer(Object source, ElapsedEventArgs e)
       {
           System.Threading.Tasks.Task[] tasks = new System.Threading.Tasks.Task[10];
           for(int i=0; i<10; i++)
           {

               if (tasks[i] != null && (tasks[i].Status == TaskStatus.Running ||      tasks[i].Status == TaskStatus.WaitingToRun || tasks[i].Status == TaskStatus.WaitingForActivation))
               {
                   Console.WriteLine("Task has attempted to start while already running");
               }

               else
               {
                   Console.WriteLine("Task {0} has begun", i);
                   Thread.Sleep(1000);
               }

               if (tasks[i].Status == TaskStatus.RanToCompletion)
               {
                   Console.WriteLine("\n\n\t");
                   Console.WriteLine("Task{0} has completed", i);
               }
           }

           Console.WriteLine();
           Console.WriteLine();

           System.Timers.Timer theTimer = (System.Timers.Timer)source;
           theTimer.Interval += 1000;
           theTimer.Enabled = true;
       }
  }