test.cs

using System;

class T {
    public T ()
    {
        Console.WriteLine ("T");
    }
    ~T ()
    {
        Console.WriteLine ("~T");
        throw new Exception ("T");
    }
}

class MainClass
{
    public static void Main(string[] args)
    {
        AppDomain.CurrentDomain.UnhandledException += (sender, args2) =>
            {
                Console.WriteLine ("Unhandled exception: {0}", sender);
            };
        for (int i = 0; i < 20000; i++) {
            new T ();
            GC.Collect ();
        }
        Console.WriteLine ("done!");
    }
}