/// <summary>
        /// Entry point into console application.
        /// </summary>
        private static void Main()
        {
            // Build a collection
              Collection collection = new Collection();
              collection[0] = new Item("Item 0");
              collection[1] = new Item("Item 1");
              collection[2] = new Item("Item 2");
              collection[3] = new Item("Item 3");
              collection[4] = new Item("Item 4");
              collection[5] = new Item("Item 5");
              collection[6] = new Item("Item 6");
              collection[7] = new Item("Item 7");
              collection[8] = new Item("Item 8");

              // Create iterator
              Iterator iterator = new Iterator(collection);

              // Skip every other item
              iterator.Step = 2;

              Console.WriteLine("Iterating over collection:");

              for (Item item = iterator.First(); !iterator.IsDone; item = iterator.Next())
              {
            Console.WriteLine(item.Name);
              }

              // Wait for user
              Console.ReadKey();
        }
 // Constructor
 public Iterator(Collection collection)
 {
     this._collection = collection;
 }