1. Introduction to
PRESENTED BY :
AMIRA GAMAL
ASMAA NOUH

2. Welcome
Windows 8
Windows
Phone

3. Agenda
•
•
•
Type System
Value types and Reference types
Type conversions
New types:(structs, enums, arrays, delegates)
Object System
Namespaces(packages)
Inheritances
Interfaces (collection)
Cast Operators
Attributes

4. C# Primitive Value Types

char, float, double, int, long, short

Bool

New types: decimal, uint, ulong, ushort

Structs and Enumerations…etc.

5. C# Value Sizes

6. C# Reference types

Class (Non Primitive)

object

Strings

Interfaces

Arrays

Delegate (method pointers)

7. Value Types vs. Reference Types
Example:
Does b==a after this fragment runs?

–No, if type is a Value Type

-Yes, if type is a Reference Type

8. Conversions Implicit vs. Explicit

Some conversions can be done implicitly
Example:

Others need an explicit cast
Example:

9. Structs


Like classes
Methods:(Constants,Constructors,..)

box or unbox to convert between
structs and classes.

No destructors allowed.

10. Struct Example

11. Enums
(Enumerations)

12. Enums
(Enumerations)

13. Arrays

14. Delegates

15. Delegates

16. Delegates

17. Delegates

18. Delegates

19. Delegates

20. Namespaces

21. Namespaces

22. Inheritance
Single-Inheritance Only (like Java)

23. Access Modifiers
Five Possible access Modifiers instead of four
• Private – same as java
• Public - same as java
• Protected – only this class and derived classes
• Internal – only classes in the same assembly file
• Protected internal – any class in the same
assembly or any derived class – even if its in a
different assembly file

24. Collections

Collection classes are specialized classes
for data storage and retrieval

Most collection classes implement the
same interfaces.

Many classes provided by the runtime
libraries implement ICollection. (arrays, ..)
System.Collections.ICollection

25. Video

26. video

27. Any Questions?

28. Contact Us:
Amira Gamal
Amera.gamal@Hotmail.com
Twittwer: @Amira_gamalm
FB: /amiragamalsalem
Asmaa Nouh
Asmaa.nouh@Hotmail.com
Mob. No.: 01112644445
FB: /smsmnouh