How can this be?

Question

Look at this code. When I run it, pushing the button should create a new object, and the old should be deleted, but thats not what happening. Compile the code and try it. How can this be? /J Lindroos using System.Timers; using System; using System.Windows.Forms; using System.Drawing; public interface ITimerListener { void Tick(int seconds); } public class TimerClass { System.Timers.Timer t=null; int seconds; ITimerListener listener; public TimerClass(ITimerListener listener) { seconds=0; this.listener=listener; t=new System.Timers.Timer(); t.Elapsed+=new ElapsedEventHandler(Tick); t.Interval=1000; t.Enabled=true; Console.WriteLine("New timerclass"); } public void Tick(object source, ElapsedEventArgs e) { seconds++; listener.Tick(seconds); } } public class TestClass : ITimerListener { TimerClass tc; public TestClass() { //Making the form and the button Form f=new Form(); f.Size=new Size(100,100); Button b=new Button(); b.Text="Start timer"; b.Size=new Size(90,32); b.Location=new Point(5,32); b.Click+=new EventHandler(b_Click); f.Controls.Add(b); f.ShowDialog(); } public void b_Click(object sender, EventArgs e) { //Creating a NEW TimerClass tc=new TimerClass(this); } public void Tick(int seconds) { //Writing the seconds Console.WriteLine(seconds); } public static void Main(string[] args) { TestClass t=new TestClass(); } }