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1. Design Patterns for 70% of genious programmers Aamir Khan Solution Architect

2. Design Patterns for 70% of programmers in the world Saurabh Verma Solution Architect I blog at http://www.domaindrivendesign.info

4. Normal Classes vs Abstract Classes vs Interfaces Normal Class: This is a normal class  Abstract Class: These cannot be instantiated directly. They may provide partial implementations and exists solely for the purpose of inheritance. Interfaces: Defines a contract. Concrete implementations needs to implement each property and method as per contract. Shut up ! We know all this

5. Million Dollar Question? What is Why?

6. Normal Class vs Abstract Class? If a particular class is a entity which is not required to be instantiated by the application directly, go for Abstract Class Employee can be abstract class

7. Abstract Class vs Interfaces? If a particular class contains any default behavior, go for Abstract Class If every concrete class has its own implementation, go for Interfaces Work – Management, Programming

8. MOVIES & ACTORS Shahrukh Khan Salman Khan riding bike Actors in a Movie

9. IS-A vs HAS-A vs CAN-DO IS-A Inheritance Shahrukh Khan is an ACTOR HAS-A Composition Movie has ACTORS CAN-DO Interfaces Salman Khan can DRIVE BIKE IS-A Inheritance Shahrukh Khan is an ACTOR HAS-A Composition Movie has ACTORS CAN-DO Interfaces Salman Khan can DRIVE BIKE

11. History of Software Patterns

13. Let’s understand design patterns by purpose

14. Let’s understand the purpose + Creational Patterns Structural Patterns Final Product Behavioral Patterns

15. Let’s understand the purpose

16. Design Patterns as per their PURPOSE

17. Creational Patterns

18. Factory Method

20. Factory Method System.Data.SqlClient.SqlClientFactory

21. Abstract Factory Pattern

23. Abstract Factory Method System.Data.Common.DbProviderFactories

24. Singleton Pattern

26. Singleton Pattern System.Data.SqlClient.SqlClientFactory

27. Structural Patterns

28. Façade Pattern

30. Façade Pattern Its all about the service

31. Decorator Pattern

33. Decorator Pattern System.IO.BufferedStream:Stream

34. Composite Pattern

36. Composite Pattern System.Web.UI.Control (Render Mechanism)

37. Composite Pattern

38. Adapter Pattern

40. Adapter Pattern GearsTypelib.HtmlDialogHostClass (Interop.GearsTypelib)

41. Decorator vs Adapter Decorator looks like Adapter which “decorates” an existing class to make it compatible. Though, Decorator doesn’t wants you to decorate every method in the Adapted class. But who has stopped from doing it. “ Never underestimate the power of a developer”

42. Decorator vs Façade Façade is a way of hiding a complex system inside a simpler interface, whereas Decorator adds function by wrapping a class.

43. Behavioural Patterns

44. Command Pattern

46. Command Pattern System.ComponentModel.Design.MenuCommand

47. Command Pattern Saurabh.Learning.DesignPatterns.Patterns.CommandPattern

48. Strategy Pattern

50. Strategy Pattern System.Collections.ArrayList

51. Template Method

53. Template Method

55. I hate my job

56. Top 5 ADVICES NOT TO FOLLOW

57. Reflect when you want 

58. Answers, anybody?

59. CONTENT STOLEN FROM  BOOKS: Head First Design Patterns Design Patterns in C# Design Patterns WEBSITES: Wikipedia, MSDN, doFactory and GOOGLE

60. Learn it all, at my blog http://www.domaindrivendesign.info Don’t contact me at, saurabh.net [at] gmail.com Saurabh Verma Solution Architect