"C # Illustrated Tutorial" Four reading notes: Classes and inheritance

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One, the universe: Object

(1) Except for the special Object class, all other classes are derived classes, even if they do not display the base class definition.

(2) A derived class can have only one base class, called single inheritance .

Second, base class that Thing

(1) How do I access a base class member in a derived class? Use the base keyword, such as base. Field1;

(2) How do I block a method or member in a base class? Use the New keyword before the member definition defined by the derived class;

(3) How do I use a reference to a base class? You can use the Richter substitution rule to create a base class object that points to a derived class.

The small character has University Q: member access modifier

(1) Public: All classes, including the internal and external classes of the assembly, can be accessed with no restrictions;

(2) Private: can only be accessed by members of his own class;

(3) Protected: Allows members of their own class and members of derived classes that inherit from the class to access;

(4) Internal: visible to all classes within the assembly;

(5) Protected internal: visible to all members of derived classes that inherit from the class and to classes inside all assemblies;

Iv. Sealing class and Static class

(1) Sealed class: Cannot be inherited, need to use sealed modifier;

(2) Static class:

All members of the ① class must be static;

The ② class can have a static constructor, but cannot have an instance constructor;

③ Static class is implicitly sealed and cannot be inherited;

V. Extension methods and Naming conventions

(1) Extension method: Allows you to write a method that is associated with a class other than the class that declares it.

The extension method requires three points: the class that declares the extension method must be a static class ①;

The ② extension method itself must also be a static method;

The ③ parameter must include the This keyword, followed by the name of the class it extends;

(2) Naming convention: ①pascal case, ②camel case, ③ underline and camel case;

Vi. Mind Mapping of this chapter

Attachment

Mind Mapping (JPG, PDF, and mmap files): Http://pan.baidu.com/s/1i3qmVfZ

Zhou Xurong

Source: http://www.cnblogs.com/edisonchou/

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"C # Illustrated Tutorial" Four reading notes: Classes and inheritance