Object-oriented Design Patterns

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Reference types, Value types, and Patterns - slide 24 : 29

Object-oriented Design Patterns

Object-oriented design patterns were introduced in the book "Design Patterns - Elements of Reusable Object-Oriented Software" by Gamma, Helm, Johnson and Vlissides.

Twenty three patterns categorized as
- Creational Patterns
  - Abstract factory, Factory method, Singleton, ...
- Structural Patterns
  - Adapter, Composite, Proxy, ...
- Behavioral Patterns
  - Command, Iterator, Observer, ...

Design Patterns in C# from dofactory.com

There are patterns in a variety of different areas, and at various levels of abstractions