1. Classes and Inheritance
靜宜大學資工系
蔡奇偉副教授
©2011

2. 大綱

3. Class Inheritance
Base Class
Derived Class

5. Accessing the Inherited Members

6. All Classes Are Derived from Class object

7. Hiding Members of a Base Class

10. Base Access
keyword base

11. Using References to a Base Class
An instance of a derived class consists of an instance of the base class, plus the additional members of the derived class. A reference to the derived class points to the whole class object, including the base class part. If you have a reference to a derived class object, you can get a reference to just the base class part of the object by casting the reference to the type of the base class by using the cast operator. The cast operator is placed in front of the object reference and consists of a set of parentheses containing the name of the class being cast to.

13. Virtual and Override Methods

16. Constructor Execution

17. Constructor Initializers

18. use a different constructor from the same class

19. Class Access Modifiers

20. Inheritance Between Assemblies

22. Member Access Modifiers

23. Regions Accessing a Member

24. Public Member Accessibility

25. Private Member Accessibility

26. Protected Member Accessibility

27. Internal Member Accessibility

28. Protected Internal Member Accessibility

29. Summary of Member Access Modifiers

30. Abstract Members
An abstract member is a function member that is designed to be overridden.

31. Comparing Virtual and Abstract Members

32. Abstract Classes

35. Sealed Classes

36. Static Classes
A static class is a class where all the members are static. Static classes are used to group data and functions that are not affected by instance data. A common use of a static class might be to create a math library containing sets of mathematical methods and values.

37. Extension Methods