C＃抽象类

Question

Does a compiler compiles an abstract class in C#?

If yes then how does compiler treats an abstract class, like a normal class or there is some difference.

And if no then how does it allow inheritance of the data members and a member function of an abstract class in derived class.

Answer 1

An abstract class indeed behaves like a normal class in IL, the only difference is the added abstract flag/keyword.

A generic public class in IL looks like this (without body)

.class public auto ansi beforefieldinit 
  NAMESPACE.CLASS_NAME
    extends [mscorlib]System.Object

an abstract class looks like this

.class public abstract auto ansi beforefieldinit 
  NAMESPACE.CLASS_NAME
    extends [mscorlib]System.Object

I can recommend you creating test assemblys and browsing them with dotPeek from JetBrains (its a free tool). You can look trough the code and the IL code at the same time.