using System;
using System.Collections.Generic;
using System.Globalization;
using System.IO;
using System.Text;
using System.Security.Cryptography;
public class MainClass
{
public static void Main()
{
object target = new object();
WeakReference wr = new WeakReference(target);
Console.WriteLine("IsAlive: {0}", wr.IsAlive);
GC.Collect();
Console.WriteLine("IsAlive: {0}", wr.IsAlive);
}
}