using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ConsoleApplication1
{
    class Program
    {
        public class Fruits
        {
            public string Name;
            public Fruits(string name)
            {
                this.Name = name;
            }
        }

        public static void TestWeakRef()
        {
            Fruits apple = new Fruits("Apple");
            Fruits orange = new Fruits("Orange");

            Fruits fruit1 = apple;
            WeakReference fruit2 = new WeakReference(orange);

            Console.WriteLine("(1) Fruit1 = \"{0}\", Fruit2 = \"{1}\"",
                fruit1.ToString(), fruit2.Target == null ? "" : fruit2.Target.ToString());

            apple = null;
            orange = null;

            GC.Collect();

            Console.WriteLine("(2) Fruit1 = \"{0}\", Fruit2 = \"{1}\"",
                fruit1 == null ? "" : fruit1.ToString(), fruit2.Target == null ? "" : fruit2.Target.ToString());
        }
        static void Main(string[] args)
        {
            TestWeakRef();
        }
    }
}