Collection

• A Collection is a specialized class that organizes and exposes a group of objects.
  
• Various collection classes are ArrayList, BitArray, HashTable, SortedList, Queue and Stack.
  
• They are all included in System.Collections namespace.
  
• Like arrays, members of collections can be accessed by an index.
  
• Unlike arrays, collections can be resized dynamically.
  
• Collection Classes implement following interfaces…
  
  • IEnumerable - Supports method GetEnumerator ()
    
  • IEnumerator - Supports method MoveNext () and property Current