Collections: Easy way to work with a group of objects.
Types of C# collection classes:
- System.Collections.Generics: Group compatible type of object
- System.Collections: Group objects of different types
- System.Collections.Concurrent: Help to achieve Threat-Safe code (multiple threads accessing concurrently).
System.Collections.Generics
- List<T>: Access by index
- Stack: Elements stored a LIFO (Last In First Out): Push & Pop methods.
- Queue: Elements stored as FIFO (First In Firs Out): Enqueue & Dequeue methods.
- SortedList<TKey, TValue>: key/value pairs sorted in an order.
- Dictionary<Tkey, TValue>: key/value pairs without an specific order
System.Collections
- ArrayList: Can contain diferent objects types. Can sort.
- Hashtable: key/value pairs managed with the hash of the key.
System.Collections.Concurrent
- ConcurrentStack
- ConcurrentQueue
- ConcurrentDictionary