The System.Collections namespace contains interfaces and classes that define various collections of objects, such as lists, queues, bit arrays, hashtables and dictionaries.
Namespace hierarchy
Classes
| Class |
Description |
| ArrayList |
Implements the IList interface using an array whose size is dynamically increased as required. |
| 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). |
| CaseInsensitiveComparer |
Compares two objects for equivalence, ignoring the case of strings. |
| CaseInsensitiveHashCodeProvider |
Supplies a hash code for an object, using a hashing algorithm that ignores the case of strings. |
| CollectionBase |
Provides the abstract (MustInherit in Visual Basic) base class for a strongly typed collection. |
| Comparer |
Compares two objects for equivalence, where string comparisons are case-sensitive. |
| DictionaryBase |
Provides the abstract (MustInherit in Visual Basic) base class for a strongly typed collection of key-and-value pairs. |
| Hashtable |
Represents a collection of key-and-value pairs that are organized based on the hash code of the key. |
| Queue |
Represents a first-in, first-out collection of objects. |
| ReadOnlyCollectionBase |
Provides the abstract (MustInherit in Visual Basic) base class for a strongly typed read-only collection. |
| SortedList |
Represents a collection of key-and-value pairs that are sorted by the keys and are accessible by key and by index. |
| Stack |
Represents a simple last-in-first-out collection of objects. |
Interfaces
| Interface |
Description |
| ICollection |
Defines size, enumerators and synchronization methods for all collections. |
| IComparer |
Exposes a method that compares two objects. |
| IDictionary |
Represents a collection of key-and-value pairs. |
| IDictionaryEnumerator |
Enumerates the elements of a dictionary. |
| IEnumerable |
Exposes the enumerator, which supports a simple iteration over a collection. |
| IEnumerator |
Supports a simple iteration over a collection. |
| IHashCodeProvider |
Supplies a hash code for an object, using a custom hash function. |
| IList |
Represents a collection of objects that can be individually accessed by index. |
Structures
| Structure |
Description |
| DictionaryEntry |
Defines a dictionary key-and-value pair that can be set or retrieved. |
See Also
.NET Framework Class Library
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Technische docs, tools
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