1. CSE 136 Lecture 3 Part 1
 Introduction to C# language
 Memory Management
 Static vs non-static
 Properties
 Inheritance
 Modifiers (public, private, protected, etc)
 Namespace and Assembly (dll, exe)

2. Overview

3. C# Simple Program

4. C# keywords Similar to Java

5. C# Pre-defined types

6. C# type values range

7. Stack Memory

8. Heap Memory

9. Value Type vs Reference Type

10. Value Types on Stack

11. Class Type

12. Class Type and Heap

13. Boxing

14. Unboxing
Why box/unbox?
Pass variables to method as reference

15. Value Parameter

16. Reference Parameter box/unbox concept

17. Out Parameter

18. Static Field

19. Static Function Members

20. Const field vs Static field

21. Properties

22. Constructor
Same method name
Different param types

23. Static Constructor

24. Destructor

25. Inheritance - Concept
Object re-use

26. Inheritance - Casting

27. Inheritance - virtual & override

28. Inheritance - Class Object

29. Constructor and inheritance

30. Modifier Provide code security
Assembly: Dll, Exe
(Output of VS project)

31. Modifier and inheritance

32. Assembly and namespace
 Namespace is a collection of names wherein
each name is unique
 ex: names CSE136.students
 ex: names CSE136.notes
 Assembly is an output unit (dll, exe).
 An assembly can contain multiple namespaces
 ex: CSE136.dll

33. Review question
 How many bits is type int
 Does stack store type struct
 Where is type class data stored (stack or heap)?
 Where is static class data stored?
 Is string a value type?
 Difference between ref and out?
 Difference between static and const?
 Difference between public and protected?
 Difference between override and overload?

34. Break

35. CSE 136 - Lecture 3 Part 2
 Abstract Class
 Interfaces
 Generics
 Collections
 Enumeration

36. Abstract Class

37. Sealed
 The opposite of
abstract class
 Instantiated as a
stand-alone class
 Cannot derive from a
sealed class

38. Interface 1
Similar to abstract class
without the method
implementation

39. Interface 2

40. Interface 3 - Polymorphism
Multiple forms
(Method overriding)

41. Interface 4 - Polymorphism
Animal takes
on multiple forms
ILiveBirth takes
on multiple forms

42. Generics 1

43. Generics 2

44. Generic 3

45. Generic 4
Creating Variables and Instances
Using a constructed type to create a reference and an instance

46. Generic 5
Two constructed classes created from a generic class

47. Generic 6

48. Collections 1
Using List to store string data

49. Collections 2
List can also be used as a list of int

50. Collections 3
Using Stack of string

51. Dictionary
Collections 4 - Another generic collection type

52. Enumeration 1 Iterator Pattern (Design Pattern)

53. Enumeration 2 - IEnumerator interface

54. Enumeration 3 - interface

55. Review question
 Difference between abstract class and
interface?
 Difference between inheritance and
polymorphism?
 What is type safe?
 Is generic type safe?
 Difference between enumerable and
enumerator?

56. Your assignment
 Finish your DB design and stored procedures
based on your UML diagram
 Demo to TA by Thursday end of class (25%
late penalty will apply for late turn-ins)

57. References
 .NET : Architecting Applications for the
Enterprise
 C# Illustrated