using System;

using System.Threading;

​

namespace Program

{

    public class Program

    {   

        public static void Main(string[] args)

        {

            var stateTimer = new Timer(t => Console.WriteLine("Timer!"), null, 50, 50);

            Thread.Sleep(70);

            stateTimer = null;

            GC.Collect();

            GC.WaitForPendingFinalizers();

            Thread.Sleep(1500);

        }

    }

}

​