对象类型是否包含受保护的虚拟 Finalize 方法？

Question

C# 6.0 in a Nutshell by Joseph Albahari and Ben Albahari (O’Reilly).

Copyright 2016 Joseph Albahari and Ben Albahari, 978-1-491-92706-9.

在第 100-101 页指出，对象 class 成员是：

public class Object
{
    public Object();
    public extern Type GetType();
    public virtual bool Equals (object obj);
    public static bool Equals (object objA, object objB);
    public static bool ReferenceEquals (object objA, object objB);
    public virtual int GetHashCode();
    public virtual string ToString();
    protected virtual void Finalize(); //<-- this one
    protected extern object MemberwiseClone();
}

这促使我去检查 VS's intellisense 是否为任何参考实例提供了一个 Finalize() 方法，因为我不记得曾经见过一个。

我没有成功获得这样一个继承了 Finalize 成员的对象（我试图在函数内部访问它，意识到它是受保护的）。

我检查了 .NET's open source code 并且 object.cs 文件不包含 Finalize 方法。

我错过了什么？这是作者的错误吗？

Answer 1

来自MSDN：

The C# compiler does not allow you to override the Finalize method. Instead, you provide a finalizer by implementing a destructor for your class. A C# destructor automatically calls the destructor of its base class.

您必须使用 ~ClassName() 来实现 destructor。

Object.cs 写成 C# 所以它有 ~Object() 而不是 Finalize().

我建议你阅读这篇文章article and this answer

来自 Eric Lippert:

This feature is confusing, error-prone, and widely misunderstood. It has syntax very familiar to users of C++, but surprisingly different semantics. And in most cases, use of the feature is dangerous, unnecessary, or symptomatic of a bug.
Sometimes you need to implement features that are only for experts who are building infrastructure; those features should be clearly marked as dangerous—not invitingly similar to features from other languages.

对象类型是否包含受保护的虚拟 Finalize 方法？

Does the object type contain a protected virtual Finalize method?

.net

c#

finalizer

mscorlib