C#

using System;
using System.ComponentModel;
using System.IO;
using System.Windows.Forms;

namespace WindowsFormsApplication2 {
	public partial class Form1 : Form {
		public Form1() {
			InitializeComponent();
			log("start");
			Application.ApplicationExit+=delegate(object sender, EventArgs e) {
				string s=SomeTrace.TraceLog;
				label1.Text="all logs: "+s;
				MessageBox.Show(s);
				File.WriteAllText("log.txt", s);
			};
		}

		private void log(string s) {
			label1.Text=s;
			SomeTrace.log(s);
		}

		private void btnQuit_Click(object sender, EventArgs e) {
			log("btnQuit_Click");
			Application.DoEvents();
			Application.Exit();
		}
	}

	public class SomeTrace {
		public static string TraceLog=DateTime.Now.ToLongTimeString();
		public static void log(string s) {
			TraceLog+=Environment.NewLine+s;
		}
	}
}

thatdiceygirl wrote:

the GC must have already tidied up the SeparateClass at this point?

thatdiceygirl wrote:

have to refactor anyway,

foreach (Type type in assembly.GetTypes())
{
      if (type.IsClass == true)
      {
            SeparateClass = Activator.CreateInstance(type) as ISeparateClass;
      }
}