C# Language Specification - Willy .Net

Chapter 17 Classesisusing System;class A{~A() {Console.WriteLine("A's destructor");}}class B: A{~B() {Console.WriteLine("B's destructor");}}class Test{static void Main() {B b = new B();b = null;GC.Collect();GC.WaitForPendingFinalizers();}}B’s destructorA’s destructorsince destructors in an inheritance chain are called in order, from most derived to least derived. The GC.Collectmethod is not required, but may be provided by an implementation. end example]Destructors may be implemented by overriding the virtual method Finalize on System.Object. In any event,C# programs are not permitted to override this method or call it (or overrides of it) directly. [Example: Forinstance, the programclass A{override protected void Finalize() {} // error}public void F() {this.Finalize();}// errorcontains two errors. end example]The compiler behaves as if this method, and overrides of it, does not exist at all. [Example: Thus, this program:class A{void Finalize() {} // permitted}is valid and the method shown hides System.Object’s Finalize method. end example]For a discussion of the behavior when an exception is thrown from a destructor, see §23.3.265