CSharp - C# Collections Introduction

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Introduction

C# has a standard set of types for storing and managing collections of objects.

For example, resizable lists, linked lists, sorted and unsorted dictionaries, as well as arrays.

The types in the collection framework can be divided into the following categories:

  • Interfaces that define standard collection protocols
  • Ready-to-use collection classes (lists, dictionaries, etc.)
  • Base classes for writing application-specific collections

The collection namespaces are as follows:

Namespace
 Contains
System.Collections
 Nongeneric collection classes and interfaces
System.Collections.Specialized
 Strongly typed nongeneric collection classes
System.Collections.Generic
 Generic collection classes and interfaces
System.Collections.ObjectModel
 Proxies and bases for custom collections
System.Collections.Concurrent
 Thread-safe collections