如何判断对象是否已被垃圾回收 [英] How to Tell If an Object Has Been Garbage Collected

问题描述

我怎么知道该对象是否已被垃圾回收？

How I can know to tell if an Object has been garbage collected or not?

推荐答案

根据此：

通常无法通过使用对该对象的引用来判断该对象是否已被垃圾回收-因为一旦引用了该对象，它就会赢

You normally can’t tell whether an object has been garbage collected by using some reference to the object–because once you have a reference to the object, it won’t be garbage collected.

您可以改为使用WeakReference对象创建对对象的弱引用。出于垃圾收集的目的，弱引用是不会被视为引用的一个引用。

You can instead create a weak reference to an object using the WeakReference object. The weak reference is one that won’t be counted as a reference, for purposes of garbage collection.

在下面的代码中，我们检查垃圾回收前后以显示

In the code below, we check before and after garbage collection to show that a Dog object is garbage collected.

        Dog dog = new Dog("Bowser");

        WeakReference dogRef = new WeakReference(dog);
        Console.WriteLine(dogRef.IsAlive);

        dog = null;
        GC.Collect();

        Console.WriteLine(dogRef.IsAlive);

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