Sitecore.Collections

Class	Description
ChildList	Represents a list of subitems of an item.
FieldList	Represents the fields in an item.
FieldList.FieldListEnumerator	Represents a list enumerator of the field list. field.
HashList	Maintains a hash table of objects with the ability to retrieve the objects in the same order as they were put in.
IndexedDictionary	Maintains a dictionary of objects with the ability to retrieve the objects in the same order as they were put in.
ItemCollection	Represents a dynamic collection of items.
StringHashtable	Maintains a Hashtable of strings.

Sitecore.Collections Namespace