静态成员的垃圾收集

问题描述

静态成员会被垃圾收集器收集吗?

Will static members be ever collected by the garbage collector?

推荐答案

静态变量引用的对象只有在相关的AppDomain被垃圾回收时才会被垃圾回收.在客户端应用程序中，通常只有一个 AppDomain 在整个过程中存在.(例外情况是应用程序使用插件架构 - 不同的插件可能会加载到不同的 AppDomain 中，而 AppDomain 可能会在以后卸载.)

Objects referenced by static variables will only be garbage collected when the relevant AppDomain is garbage collected. In client applications, there's often just a single AppDomain which lives for the duration of the process. (An exception is when the application uses a plug-in architecture - different plug-ins may be loaded in different AppDomains and the AppDomain may be unloaded later.)

在 ASP.NET 中，AppDomain 回收"会定期发生(出于各种原因) - 当这种情况发生时，该 AppDomain 中的静态变量将不再充当GC 根，因此不会阻止对象被垃圾回收.

In ASP.NET, "AppDomain recycling" happens periodically (for various reasons) - when this occurs, and the static variables within that AppDomain will no longer act as GC roots, and thus won't prevent objects being garbage collected.

如果您担心一个对象被垃圾回收，而您仍然通过静态变量引用它，那么您可以放心.虽然您可以访问该对象，但它不会被垃圾回收.

If you were worried about an object being garbage collected while you still had a reference to it via a static variable, though, you can relax. While you can access the object, it won't be garbage collected.

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