Collections

 

1. Arrays: Fixed-size collections of elements of the same type.
2. ArrayList:Any datatype can be inserted
3. List<T>: Dynamic arrays that automatically resize as needed.
4. Dictionary<TKey, TValue>: Collection of key-value pairs.
5. HashSet<T>: Collection of unique elements.
6. Queue<T>: First-in-first-out (FIFO) collection.
7. Stack<T>: Last-in-first-out (LIFO) collection.
8. LinkedList<T>: Doubly linked list.
9. SortedDictionary<TKey, TValue>: Sorted collection of key-value pairs.
10. SortedSet<T>: Sorted collection of unique elements.
11. Hashtable: Non-generic collection of key-value pairs.
12. SortedDictionary<TKey, TValue>: Sorted collection of key-value pairs.
13. SortedSet<T>: Sorted collection of unique elements.
14. BitArray: Collection of bits that can be individually set or cleared.
15. ConcurrentBag<T>: Thread-safe collection for unordered bags of objects.
16. ConcurrentDictionary<TKey, TValue>: Thread-safe collection of key-value pairs.
17. ConcurrentQueue<T>: Thread-safe first-in-first-out (FIFO) collection.
18. ConcurrentStack<T>: Thread-safe last-in-first-out (LIFO) collection.
19. Immutable collections: Collections that cannot be modified after creation, such as ImmutableList<T>, ImmutableDictionary<TKey, TValue>, etc.