Proving to some noobs that C# finalizers/dtors aren't reliable

test.cs

using System;
using System.Collections.Generic;
using System.Threading;

class Test
{
   public static long count = 0;
   public static int dtorTime = 201;
   
   readonly long[] bogus_ = new long[1ul<<12];
   private long c;
   public Test()
   {
      c = Interlocked.Increment(ref count);
   }
   ~Test()
   {
      Thread.Sleep(dtorTime);
      Interlocked.Decrement(ref count);
      Console.WriteLine($"{c} DESTROYED!!!");
   }
}

class TestH
{
   public void TestM()
   {
      List<Test> list = new List<Test>();
      for (int i = 0; i < 4; i++)
         list.Add(new Test());
   }
}

class Program
{
   static void Main(string[] args)
   {

      if (new Random().Next(2) == 0)
      {
         Console.WriteLine("application will quit before dtors finish");
         Test.dtorTime = 2010;
      }

      for (int i = 0; i < 4; i++)
      {
         new TestH().TestM();
      }
      Console.WriteLine($"balance: {Test.count}");
//      GC.Collect();
//      GC.WaitForPendingFinalizers();
      Console.WriteLine($"final balance: {Test.count}");
      //Console.ReadKey();
   }
}

The Noob has to make it MT safe