gistfile1.txt

using System;
 
namespace ConsoleApplication8
{
  class Program
	{
		static object value;
 
		static void Main (string[] args)
		{
			WeakReference weak = null;
			var v = new System.Threading.Thread (() =>  { value = new object(); weak = new WeakReference (value); });
			v.Start (); v.Join ();
			value = null;
 
			GC.Collect();
			GC.WaitForPendingFinalizers();
			GC.Collect();

			Console.WriteLine (weak.IsAlive);
		}
	}
}