After completing this chapter, you will be able to
Manually define an enumerator that can be used to iterate over the elements in a collection.
Implement an enumerator automatically by creating an iterator.
Provide additional iterators that can step through the elements of a collection in different sequences.
In Chapter 10, and Chapter 18, you learned about arrays and collection classes for holding sequences or sets of data. Chapter 10 also introduced the foreach statement that you can use for stepping through, or iterating over, the elements in a collection. In these chapters, you used the foreach statement as a quick and convenient way of accessing the contents of an array or collection, but now it is time to ...