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Generic Collections in .Net



Namespace: System.Collections.Generic

.Net Framework provides support for creating general purpose classes/interfaces/delegates which can be consumed by any data type. The data type is specified as generic parameter while creating the respective object.

.Net Framework provides a number of Generic Collections.

 



Generic Collection class structure:
                Similar to non-generic collections generic collections have generic interfaces. Like:

IEnumerator<T> → IEnumerable<T> → ICollection<T> → IList<T>

Similarly to have typed enumerator one must use the typed object to obtain typed enumerator:

List<string>.Enumertor e = stringList.GetEnumerator();

Generic Collections also provide generic IComarer and IEqualityComparer interface. But generics also provide default implementation as Comparer and EqualityComparer for IComparer and IEqualityComparer respectively.

.Net Framework also provides CollectionBase, ReadOnlyCollectionBase, and DictionaryBase classes to implement your own collection base on them instead of looking for interfaces and implementing them.
 
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