#555 – Enumerable Objects and Enumerators

An enumerable object is a type that represents a sequence of elements.  The type implements either the IEnumerable or IEnumerable<T> interface, which means that it implements a GetEnumerator method, which is called to get the enumerator for the enumerable class.

An enumerator is an object that knows how to move through a sequence of elements.  It implements either the IEnumerator or IEnumerator<T> interface, which means that it exposes a Current property that points to the current element in the sequence and a MoveNext method that moves to the next element.

You can think of an enumerator as a sort of pointer into a sequence of elements.

Enumerators, used on enumerable objects, are the internal mechanism that allows using a foreach statement to iterate through a collection of items.

Advertisements

About Sean
Software developer in the Twin Cities area, passionate about .NET technologies. Equally passionate about my own personal projects related to family history and preservation of family stories and photos.

One Response to #555 – Enumerable Objects and Enumerators

  1. Pingback: #560 – Returning an Enumerator from an Iterator « 2,000 Things You Should Know About C#

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

%d bloggers like this: