using System;

​

namespace ExceptionTests

{

    public class Program

    {

        public static Foo StrongReference = null;

        public static void Main()

        {

            Foo foo = new Foo();

            foo = null;

            Console.WriteLine("Created, cleaning up.");

            GC.Collect();

            GC.WaitForPendingFinalizers();

            StrongReference = null;

            Console.WriteLine("After cleaning. Running GC again.");

            GC.Collect();

            GC.WaitForPendingFinalizers();

        }

    }

    public class Foo{

        bool wasResurrected = false;

        ~Foo(){

            if(!wasResurrected)

            {

                Program.StrongReference = this;

                GC.ReRegisterForFinalize(this);

                wasResurrected = true;

                Console.WriteLine("Resurrected!");

            }else{

                Console.WriteLine("Finalizing again");

            }

        }

    }

}