C#中有虚拟类吗？

Is there Virtual class in C#?

提问by Tejus

I have read about virtual methods in C#. Is there any concept called virtual class in C#? Is abstract class in C# and virtual class in C++ the same?

我已经阅读了 C# 中的虚拟方法。C#中是否有任何称为虚拟类的概念？C#中的抽象类和C++中的虚拟类是一样的吗？

采纳答案by BrokenGlass

There is no such thing in C# - and it's really not necessary since multiple implementation inheritance is not supported. Making a class abstract really only means that you cannot create instances of that class and they might not be fully implemented (e.g. might contain abstract methods).

C# 中没有这样的东西 - 而且它真的没有必要，因为不支持多实现继承。使类抽象实际上仅意味着您不能创建该类的实例，并且它们可能没有完全实现（例如可能包含抽象方法）。

回答by si618

There are no virtual classes in C#. Abstract class is not the same since you cannot instantiate an abstract class.

C# 中没有虚拟类。抽象类不一样，因为您不能实例化抽象类。

You can do the opposite of marking something virtual by marking it sealed, which prevents it from being inherited.

您可以通过标记它做标记的东西虚拟的相反密封，以防止它被继承。

回答by Isaiah Nelson

I will opine with a link to this earlier SO post: In C++ what is a virtual base class?

我将通过链接到此较早的 SO 帖子：在 C++ 中什么是虚拟基类？

As others have mentioned, since C# does not have multiple inheritance, the need to have a "virtual base class" that limits multiple inheritance is not needed, hence it does not apply to C#. Only members in C# can be virtual.

正如其他人提到的，由于 C# 没有多重继承，因此不需要限制多重继承的“虚拟基类”，因此它不适用于 C#。只有 C# 中的成员可以是虚拟的。