.NET Design Patterns

Design Patterns can be explained as recurring solutions to recurring problems in Software architecture. Patterns are all about reusable design and interactions of objects. The 23 Gang Of Four (GOF) patterns are considered as the foundation for all other patterns.

We can classify the Design Patterns as mainly onto

• Creational
• Structural
• Behavioral

Creational Patterns:

Abstract Factory	Creates an instance of several families of classes
Builder	Separates object construction from its representation
Factory Method	Creates an instance of several derived classes
Prototype	A fully initialized instance to be copied or cloned
Singleton	A class of which only a single instance can exist

Structural Patterns :

Adapter	Match interfaces of different classes
Bridge	Separates an object’s interface from its implementation
Composite	A tree structure of simple and composite objects
Decorator	Add responsibilities to objects dynamically
Facade	A single class that represents an entire subsystem
Flyweight	A fine-grained instance used for efficient sharing
Proxy	An object representing another object

Behavioral Pattern :

Chain of Resp	A way of passing a request between a chain of objects
Command	Encapsulate a command request as an object
Interpreter	A way to include language elements in a program
Iterator	Sequentially access the elements of a collection
Mediator	Defines simplified communication between classes
Memento	Capture and restore an object's internal state
Observer	A way of notifying change to a number of classes
State	Alter an object's behavior when its state changes
Strategy	Encapsulates an algorithm inside a class
Template Method	Defer the exact steps of an algorithm to a subclass
Visitor	Defines a new operation to a class without change

Lets discuss each of these Patterns in my upcoming blogs. All the above definitions are referred from GOF. Keep watching this space...