public class MyClass { private static MyClass heldInstance; public MyClass() { heldInstance = this; } }
解决方法
您发布的课程不会被垃圾收集.你可以通过给它一个带控制台输出的终结器来测试它:
public class MyClass { private static MyClass heldInstance; public MyClass() { heldInstance = this; } ~MyClass() { Console.WriteLine("Finalizer called"); } } class Program { static void Main(string[] args) { var x = new MyClass(); // object created x = null; // object may be eliglible for garbage collection Now // theoretically,a GC Could happen here,but probably not,with this little memory used System.Threading.Thread.Sleep(5000); // so we force a GC. Now all eligible objects will definitely be collected GC.Collect(2,GCCollectionMode.Forced); //however their finalizers will execute in a separate thread,so we wait for them to finish GC.WaitForPendingFinalizers(); System.Threading.Thread.Sleep(5000); Console.WriteLine("END"); } }
输出将是:
END Finalizer called
这意味着该类仅在应用程序的最终拆解时收集,而不是在常规垃圾收集期间收集.
如果您创建此类的多个实例,如下所示:
var x = new MyClass(); x = new MyClass(); x = new MyClass(); x = new MyClass();
你会得到的
Finalizer called Finalizer called Finalizer called END Finalizer called