View difference between Paste ID: zNfREPSB and rczHbGp7

 using System;
 using System.ComponentModel;
 using System.Diagnostics;
 using System.Drawing;
 using System.Threading;
 using System.Windows.Forms;
 
 namespace Systraytest
 {
     public partial class Form1 : Form, IDisposable
     {
         private readonly NotifyIcon _icon;
         private readonly ContextMenu _trayMenu;
         private BackgroundWorker _worker;
 
         private readonly MenuItem _startItem;
         private readonly MenuItem _stopItem;
         private readonly MenuItem _exitItem;
 
         public Form1()
         {
             InitializeComponent();
 
             _startItem = new MenuItem("Start", OnStartClicked);
             _stopItem = new MenuItem("Stop", OnStopClicked);
             _exitItem = new MenuItem("Exit", OnExitClicked);
 
             _trayMenu = new ContextMenu();
             SetupTrayMenu(false);
 
             _icon = new NotifyIcon();
             _icon.Text = "SysTrayTest";
             _icon.Icon = new Icon(SystemIcons.Application, 40, 40);
             _icon.ContextMenu = _trayMenu;
             _icon.Visible = true;
             SetupWorker();
         }
 
         private void SetupWorker()
         {
             _worker = new BackgroundWorker();
             _worker.WorkerSupportsCancellation = true;
             _worker.DoWork += (s, ea) =>
             {
                 var worker = s as BackgroundWorker;
 
                 Debug.WriteLine("BWorker started!");
                 while (!worker.CancellationPending)
                 {
                     Debug.WriteLine("PFFFT");
                     Thread.Sleep(1000);
                 }
 
                 Debug.WriteLine("BWorker canceled!");
             };
 
             _worker.RunWorkerCompleted += (s, ea) =>
             {
                 Debug.WriteLine("BWorker completed!");
                 SetupTrayMenu(false);
             };
         }
 
         private void SetupTrayMenu(bool running)
         {
             _trayMenu.MenuItems.Clear();
             _trayMenu.MenuItems.Add(running ? _stopItem : _startItem);
             _trayMenu.MenuItems.Add(_exitItem);
         }
 
         private void OnStartClicked(object sender, EventArgs e)
         {
             _worker.RunWorkerAsync();
             SetupTrayMenu(true);
         }
 
         private void OnStopClicked(object sender, EventArgs e)
         {
             _worker.CancelAsync();
         }
 
         private void OnExitClicked(object sender, EventArgs e)
         {
             if (_worker.IsBusy && !_worker.CancellationPending)
             {
                 _worker.CancelAsync();
             }
 
             Application.Exit();
         }
 
         protected override void OnLoad(EventArgs e)
         {
             Visible = false;
             ShowInTaskbar = false;
             base.OnLoad(e);
         }
     }
 }