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System.Collections.Generic Namespace

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The System.Collections.Generic namespace contains interfaces and classes that define generic collections, which allow users to create strongly typed collections that provide better type safety and performance than non-generic strongly typed collections.

System.Collections

Classes

  Class Description
Public class Comparer<T> Provides a base class for implementations of the IComparer<T> generic interface.
Public class Dictionary<TKey, TValue> Represents a collection of keys and values.
Public class Dictionary<TKey, TValue>.KeyCollection Represents the collection of keys in a Dictionary<TKey, TValue>. This class cannot be inherited.
Public class Dictionary<TKey, TValue>.ValueCollection Represents the collection of values in a Dictionary<TKey, TValue>. This class cannot be inherited.
Public class EqualityComparer<T> Provides a base class for implementations of the IEqualityComparer<T> generic interface.
Public class HashSet<T> Represents a set of values.
Public class KeyedByTypeCollection<TItem> Provides a collection whose items are types that serve as keys.
Public class KeyNotFoundException The exception that is thrown when the key specified for accessing an element in a collection does not match any key in the collection.
Public class LinkedList<T> Represents a doubly linked list.
Public class LinkedListNode<T> Represents a node in a LinkedList<T>. This class cannot be inherited.
Public class List<T> Represents a strongly typed list of objects that can be accessed by index. Provides methods to search, sort, and manipulate lists.
Public class Queue<T> Represents a first-in, first-out collection of objects.
Public class Stack<T> Represents a variable size last-in-first-out (LIFO) collection of instances of the same arbitrary type.
Public class SynchronizedReadOnlyCollection<T> Provides a thread-safe, read-only collection that contains objects of a type specified by the generic parameter as elements.

Structures

  Structure Description
Public structure Dictionary<TKey, TValue>.Enumerator Enumerates the elements of a Dictionary<TKey, TValue>.
Public structure Dictionary<TKey, TValue>.KeyCollection.Enumerator Enumerates the elements of a Dictionary<TKey, TValue>.KeyCollection.
Public structure Dictionary<TKey, TValue>.ValueCollection.Enumerator Enumerates the elements of a Dictionary<TKey, TValue>.ValueCollection.
Public structure HashSet<T>.Enumerator Enumerates the elements of a HashSet<T> object.
Public structure KeyValuePair<TKey, TValue> Defines a key/value pair that can be set or retrieved.
Public structure LinkedList<T>.Enumerator Enumerates the elements of a LinkedList<T>.
Public structure List<T>.Enumerator Enumerates the elements of a List<T>.
Public structure Queue<T>.Enumerator Enumerates the elements of a Queue<T>.
Public structure Stack<T>.Enumerator Enumerates the elements of a Stack<T>.

Interfaces

  Interface Description
Public interface ICollection<T> Defines methods to manipulate generic collections.
Public interface IComparer<T> Defines a method that a type implements to compare two objects.
Public interface IDictionary<TKey, TValue> Represents a generic collection of key/value pairs.
Public interface IEnumerable<T> Exposes the enumerator, which supports a simple iteration over a collection of a specified type.
Public interface IEnumerator<T> Supports a simple iteration over a generic collection.
Public interface IEqualityComparer<T> Defines methods to support the comparison of objects for equality.
Public interface IList<T> Represents a collection of objects that can be individually accessed by index.
Public interface ISet<T> Provides the base interface for the abstraction of sets.