Namespace: System.Collections
Namespace: System.Collections
Assembly: mscorlib (in mscorlib.dll)
Provides interfaces and classes that define various generic and non-generic collections of objects.
Core Collection Types
ICollection
Represents a collection of objects.
IEnumerable
Exposes the enumerator, which supports a simple iteration over a non-generic collection.
IList
Represents a non-generic collection of objects that can be individually accessed by index.
IDictionary
Represents a collection of key/value pairs.
IEnumerator
Supports a simple iteration over a non-generic collection.
Common Collection Implementations
ArrayList
Represents a strongly typed list of objects that can be accessed by index. Provides methods for searching, sorting, and manipulating lists.
Hashtable
Represents a collection of key/value pairs that are organized by hash code. Provides fast access to values by their associated key.
Queue
Represents a first-in, first-out (FIFO) collection of objects.
Stack
Represents a last-in, first-out (LIFO) collection of objects.