Enumerator and Iterator in Dynamics AX 2012

Difference between Enumerator and Iterator(use for list, Maps or Sets element’s traversing)

• We can traverse our List, Map or Set collections by using either an enumerator or an iterator 
• We can’t add/Delete elements in the List or Maps or Set using Enumerator class but we can do it via iterator class
• It is a best practice to use the Enumerator class instead of the Iterator class, because enumerators are automatically created on the same tier as the map (when calling the List.getEnumerator method)
• Enumerators require less code than iterators to initiate there instance, they perform slightly better.

For more information please refer to following link

Difference between Enumerator and Iterator in AX 2012