System.Collections Namespace

[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]

The System.Collections namespace contains interfaces and classes that define various collections of objects, such as lists, queues, bit arrays, and dictionaries.

Classes

	Class	Description
	BitArray	Manages a compact array of bit values, which are represented as Booleans, where true indicates that the bit is on (1) and false indicates the bit is off (0).
	StructuralComparisons	Provides objects for performing a structural comparison of two collection objects.

Structures

	Structure	Description
	DictionaryEntry	Defines a dictionary key/value pair that can be set or retrieved.

Interfaces

	Interface	Description
	ICollection	Defines size, enumerators, and synchronization methods for all nongeneric collections.
	IComparer	Exposes a method that compares two objects.
	IDictionary	Represents a nongeneric collection of key/value pairs.
	IDictionaryEnumerator	Enumerates the elements of a nongeneric dictionary.
	IEnumerable	Exposes the enumerator, which supports a simple iteration over a non-generic collection.
	IEnumerator	Supports a simple iteration over a nongeneric collection.
	IEqualityComparer	Defines methods to support the comparison of objects for equality.
	IList	Represents a non-generic collection of objects that can be individually accessed by index.
	IStructuralComparable	Supports the structural comparison of collection objects.
	IStructuralEquatable	Defines methods to support the comparison of objects for structural equality.