Collections
System.Collections
classes
System.Collections
classesThe classes in the System.Collections
namespace do not store elements as specifically typed objects, but as objects of type Object
.
ArrayList
Represents an array of objects whose size is dynamically increased as required.
Hashtable
Represents a collection of key/value pairs that are organized based on the hash code of the key.
Queue
Represents a first in, first out (FIFO) collection of objects.
Stack
Represents a last in, first out (LIFO) collection of objects.
The System.Collections.Specialized namespace provides specialized and strongly typed collection classes, such as string-only collections and linked-list and hybrid dictionaries.
System.Collections.Generic
classes
System.Collections.Generic
classesA generic collection enforces strong typing by allowing only the desired data type to be added. A generic collection is useful when every item in the collection has the same data type.
Dictionary<TKey,TValue>
Represents a collection of key/value pairs that are organized based on the key.
List<T>
Represents a list of objects that can be accessed by index. Provides methods to search, sort, and modify lists.
Queue<T>
Represents a first in, first out (FIFO) collection of objects.
Stack<T>
Represents a last in, first out (LIFO) collection of objects.
Dictionary<TKey, TValue>()
Dictionary internally stores object in an array, but unlike a list, where objects are added at the end of the array (or at the index), the index is calculated using a hash function.
List<T>
List internally uses arrays, if it becomes full it'll create a new larger array and copy content from the older array to the new one.
System.Collections.Concurrent
classes
System.Collections.Concurrent
classesA concurrent collection provide efficient thread-safe operations for accessing collection items from multiple threads.
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