System.Collections.Generic Namespace

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.

  ClassDescription
Public classComparer<T>Provides a base class for implementations of the IComparer<T> generic interface.
Public classDictionary<TKey, TValue>Represents a collection of keys and values.
Public classDictionary<TKey, TValue>.KeyCollectionRepresents the collection of keys in a Dictionary<TKey, TValue>. This class cannot be inherited.
Public classDictionary<TKey, TValue>.ValueCollectionRepresents the collection of values in a Dictionary<TKey, TValue>. This class cannot be inherited.
Public classEqualityComparer<T>Provides a base class for implementations of the IEqualityComparer<T> generic interface.
Public classHashSet<T>Represents a set of values.
Public classKeyedByTypeCollection<TItem>Provides a collection whose items are types that serve as keys.
Public classKeyNotFoundExceptionThe exception that is thrown when the key specified for accessing an element in a collection does not match any key in the collection.
Public classLinkedList<T>Represents a doubly linked list.
Public classLinkedListNode<T>Represents a node in a LinkedList<T>. This class cannot be inherited.
Public classList<T>Represents a strongly typed list of objects that can be accessed by index. Provides methods to search, sort, and manipulate lists.
Public classQueue<T>Represents a first-in, first-out collection of objects.
Public classSortedDictionary<TKey, TValue>Represents a collection of key/value pairs that are sorted on the key.
Public classSortedDictionary<TKey, TValue>.KeyCollectionRepresents the collection of keys in a SortedDictionary<TKey, TValue>. This class cannot be inherited.
Public classSortedDictionary<TKey, TValue>.ValueCollectionRepresents the collection of values in a SortedDictionary<TKey, TValue>. This class cannot be inherited.
Public classSortedList<TKey, TValue>Represents a collection of key/value pairs that are sorted by key based on the associated IComparer<T> implementation.
Public classStack<T>Represents a variable size last-in-first-out (LIFO) collection of instances of the same arbitrary type.
Public classSynchronizedCollection<T>Provides a thread-safe collection that contains objects of a type specified by the generic parameter as elements.
Public classSynchronizedKeyedCollection<K, T>Provides a thread-safe collection that contains objects of a type specified by a generic parameter and that are grouped by keys.
Public classSynchronizedReadOnlyCollection<T>Provides a thread-safe, read-only collection that contains objects of a type specified by the generic parameter as elements.

  InterfaceDescription
Public interfaceICollection<T>Defines methods to manipulate generic collections.
Public interfaceIComparer<T>Defines a method that a type implements to compare two objects.
Public interfaceIDictionary<TKey, TValue>Represents a generic collection of key/value pairs.
Public interfaceIEnumerable<T>Exposes the enumerator, which supports a simple iteration over a collection of a specified type.
Public interfaceIEnumerator<T>Supports a simple iteration over a generic collection.
Public interfaceIEqualityComparer<T>Defines methods to support the comparison of objects for equality.
Public interfaceIList<T>Represents a collection of objects that can be individually accessed by index.
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