Collections

Colecciones

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.

Classes

CollectionExtensions	Provides extension methods for generic collections.
Comparer	Provides a base class for implementations of the IComparer generic interface.
Dictionary<TKey,TValue>.KeyCollection	Represents the collection of keys in a Dictionary<TKey,TValue>. This class cannot be inherited.
Dictionary<TKey,TValue>.ValueCollection	Represents the collection of values in a Dictionary<TKey,TValue>. This class cannot be inherited.
Dictionary<TKey,TValue>	Represents a collection of keys and values.
EqualityComparer	Provides a base class for implementations of the IEqualityComparer generic interface.
HashSet	Represents a set of values.
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.
KeyValuePair	Creates instances of the KeyValuePair<TKey,TValue> struct.
LinkedList	Represents a doubly linked list.
LinkedListNode	Represents a node in a LinkedList. This class cannot be inherited.
List	Represents a strongly typed list of objects that can be accessed by index. Provides methods to search, sort, and manipulate lists.
PriorityQueue<TElement,TPriority>.UnorderedItemsCollection	Enumerates the contents of a PriorityQueue<TElement,TPriority>, without any ordering guarantees.
PriorityQueue<TElement,TPriority>	Represents a collection of items that have a value and a priority. On dequeue, the item with the lowest priority value is removed.
Queue	Represents a first-in, first-out collection of objects.
ReferenceEqualityComparer	An IEqualityComparer that uses reference equality (ReferenceEquals(Object, Object)) instead of value equality (Equals(Object)) when comparing two object instances.
SortedDictionary<TKey,TValue>.KeyCollection	Represents the collection of keys in a SortedDictionary<TKey,TValue>. This class cannot be inherited.
SortedDictionary<TKey,TValue>.ValueCollection	Represents the collection of values in a SortedDictionary<TKey,TValue>. This class cannot be inherited.
SortedDictionary<TKey,TValue>	Represents a collection of key/value pairs that are sorted on the key.
SortedList<TKey,TValue>	Represents a collection of key/value pairs that are sorted by key based on the associated IComparer implementation.
SortedSet	Represents a collection of objects that is maintained in sorted order.
Stack	Represents a variable size last-in-first-out (LIFO) collection of instances of the same specified type.

Structs

Dictionary<TKey,TValue>.Enumerator	Enumerates the elements of a Dictionary<TKey,TValue>.
Dictionary<TKey,TValue>.KeyCollection.Enumerator	Enumerates the elements of a Dictionary<TKey,TValue>.KeyCollection.
Dictionary<TKey,TValue>.ValueCollection.Enumerator	Enumerates the elements of a Dictionary<TKey,TValue>.ValueCollection.
HashSet.Enumerator	Enumerates the elements of a HashSet object.
KeyValuePair<TKey,TValue>	Defines a key/value pair that can be set or retrieved.
LinkedList.Enumerator	Enumerates the elements of a LinkedList.
List.Enumerator	Enumerates the elements of a List.
PriorityQueue<TElement,TPriority>.UnorderedItemsCollection.Enumerator	Enumerates the element and priority pairs of a PriorityQueue<TElement,TPriority>, without any ordering guarantees.
Queue.Enumerator	Enumerates the elements of a Queue.
SortedDictionary<TKey,TValue>.Enumerator	Enumerates the elements of a SortedDictionary<TKey,TValue>.
SortedDictionary<TKey,TValue>.KeyCollection.Enumerator	Enumerates the elements of a SortedDictionary<TKey,TValue>.KeyCollection.
SortedDictionary<TKey,TValue>.ValueCollection.Enumerator	Enumerates the elements of a SortedDictionary<TKey,TValue>.ValueCollection.
SortedSet.Enumerator	Enumerates the elements of a SortedSet object.
Stack.Enumerator	Enumerates the elements of a Stack.

Interfaces

IAsyncEnumerable	Exposes an enumerator that provides asynchronous iteration over values of a specified type.
IAsyncEnumerator	Supports a simple asynchronous iteration over a generic collection.
ICollection	Defines methods to manipulate generic collections.
IComparer	Defines a method that a type implements to compare two objects.
IDictionary<TKey,TValue>	Represents a generic collection of key/value pairs.
IEnumerable	Exposes the enumerator, which supports a simple iteration over a collection of a specified type.
IEnumerator	Supports a simple iteration over a generic collection.
IEqualityComparer	Defines methods to support the comparison of objects for equality.
IList	Represents a collection of objects that can be individually accessed by index.
IReadOnlyCollection	Represents a strongly-typed, read-only collection of elements.
IReadOnlyDictionary<TKey,TValue>	Represents a generic read-only collection of key/value pairs.
IReadOnlyList	Represents a read-only collection of elements that can be accessed by index.
IReadOnlySet	Provides a readonly abstraction of a set.
ISet	Provides the base interface for the abstraction of sets.

See also

• Generic Collections in .NET