C#基础概念二十五问

1.静态成员和非静态成员的区别？

2.const 和 static readonly 区别？

3.extern 是什么意思？

4.abstract 是什么意思？

5.internal 修饰符起什么作用？

6.sealed 修饰符是干什么的？

7.override 和 overload 的区别？

8.什么是索引指示器？

9.new 修饰符是起什么作用？

10.this 关键字的含义？

11.可以使用抽象函数重写基类中的虚函数吗？

12.密封类可以有虚函数吗？

13.什么是属性访问器？

14.abstract 可以和 virtual 一起使用吗？可以和 override 一起使用吗？

15.接口可以包含哪些成员？

16.类和结构的区别？

17.接口的多继承会带来哪些问题？

18.抽象类和接口的区别？

19.别名指示符是什么？

20.如何手工释放资源？

21.P/Invoke是什么？

22.StringBuilder 和 String 的区别？

23.explicit 和 implicit 的含义？

24.params 有什么用？

25.什么是反射？

-C# Basics twenty-five ask a Static members and non-static member difference? 2.const and static readonly difference? 3.extern What does it mean? 4.abstract What does it mean? 5.internal modifiers what role? 6.sealed modifier is doing? 7.override and overload the difference? 8 What is indexer? 9.new modifier is what role? 10.this keyword meaning? 11 You can use the abstract base class function overrides the virtual function do? 12 sealed class can have a virtual function? 13 What is the property accessor? 14.abstract can be used in conjunction with virtual do? You can use it together and override? 15 The interface can contain what members? 16 the difference between classes and structures? 17 interface, which will bring the problem of multiple inheritance? 18 the difference between abstract classes and interfaces? 19. Alias ​ ​ indicator is it? 20 How to manually release resources? 21.P/Invoke What? 22.StringBuilder and String difference? 23.explicit and implicit meanings? 24.p