Facts and Fallacies of Events in C#

//#define NET11			// uncomment this line to get .NET 1.1 compatible code

using System;
using System.Windows.Forms;			// Button

namespace LP_EventHandlerRemoval {
	class Program {
		static void Main(string[] args) {
			EventHandlerRemovalTest test=new EventHandlerRemovalTest();
			Console.WriteLine("LP#EventHandlerRemoval V1.0");
			test.Run();
			Console.Write("Hit ENTER key to terminate ");
			Console.ReadLine();
		}
	}

	public class EventHandlerRemovalTest {
		private int clicks=0;
		private int delegateCount=0;
		private Button btn=new Button();

		public EventHandlerRemovalTest() { }

		public void Run() {
			log("");
			log("Uppercase text logs program actions");
			log("Lowercase text logs results of simulated button clicks");
			log("Everything gets numbered sequentially");
			log("");
			doClick();
			addDelegate();
			doClick();
			addDelegate();
			doClick();
			removeDelegate();
			doClick();
			removeDelegate();
			doClick();
			removeDelegate();
			doClick();
			log("");
			log("Done");
			log("");
			log("Observations:");
			log("  - each ADD DELEGATE adds one delegate");
			log("  - each REMOVE DELEGATE removes one delegate (if any)");
			log("    and does not throw an exception (if none)");
			log("");
		}

		private static void log(string s) {
			if (s.Length!=0) s=DateTime.Now.ToString("ss.fff  ")+s;
			Console.WriteLine(s);
		}

		private void doClick() {
			log("CLICK");
			btn.PerformClick();
		}

		private void addDelegate() {
			log("");
			delegateCount++;
			log("ADD DELEGATE #"+delegateCount);
#if NET11
			btn.Click+=new EventHandler(btn_Click);
#else
			btn.Click+=btn_Click;
#endif
		}

		private void removeDelegate() {
			log("");
			log("REMOVE DELEGATE #"+delegateCount);
			delegateCount--;
			try {
#if NET11
				btn.Click-=new EventHandler(btn_Click);
#else
				btn.Click-=btn_Click;
#endif
			} catch { log("failed to remove handler"); }
		}

		private void btn_Click(object sender, EventArgs e) {
			clicks++;
			log("    got click #"+clicks);
		}
	}
}