using System;

class Class1 : WeakReference
{
	Class1(object obj)
		: base(obj)
	{
	}
		
	static void Main(string[] args)
	{
		Class1 r = new Class1("foo");
		Console.WriteLine(r.Target);

		Class1 clone = (Class1)r.MemberwiseClone();

		GC.Collect();
		GC.WaitForPendingFinalizers();

		new Class1("bar");

		Console.WriteLine(clone.Target);
	}
}