Using C# locks and threads to rip through a to-do list

class Task
{
  public byte[] sharedData;
  public DateTime day;
  public void Run()
  {
    ... do the processing here, using the shared data and the day ...
  }
}

class ToDoList
{
  public byte[] sharedData;
  List<Task> toDoList;

  public void Go()
  {
    // Fill the to-do list with a task for every day in the year
    toDoList = new List<Task>();
    for (DateTime d = new DateTime(2008, 1, 1);
         d.Year == 2008;
         d = d.AddDays(1))
    {
      Task t = new Task();
      t.day = d; // The one particular day we want
      t.sharedData = sharedData; // The year's worth of data
      toDoList.Add(t); // Add the task to the to-do list
    }

    // Run 2 threads per logical processor (a physical cpu with
    // hyperthreading enabled counts as 2 logical processors)
    Thread[] threads = new Thread[Environment.ProcessorCount * 2];
    for (int t = 0; t < threads.Length; t++)
    {
      threads[t] = new Thread(Runner); // Make the new thread
      threads[t].Start(); // Start it running
    }

    // Wait for the threads to finish all the tasks
    for (int t = 0; t < threads.Length; t++)
    {
      threads[t].Join();
    }
  }

  /// <summary>
  /// This is the thread runner that does the work
  /// It basically eats its way through the to-do list,
  /// returning when there's nothing left on the list.
  /// </summary>
  void Runner()
  {
    while (true)
    {
      Task task;

      // Try find a task to do
      lock (toDoList) // Lock the task list while grabbing
                      // a task so other threads cant touch it
      {
        if (toDoList.Count == 0) return; // nothing left to do so quit this thread
        task = toDoList[0]; // grab it from the head of the list
        toDoList.RemoveAt(0); // remove it from the list
      }

      // Run the task just grabbed from the list
      task.Run();
    }
  }
}

class Program
{
  static void Main(string[] args)
  {
    byte[] data = File.ReadAllBytes("MyYearsData.dat");
    
    ToDoList todo = new ToDoList();
    todo.sharedData = data;
    todo.Go();
  }
}