public partial class Form1 : Form
    {
        private bool stop = false;
        private string message;
        public Form1()
        {
            InitializeComponent(); 
            icnNotify.ContextMenu = new System.Windows.Forms.ContextMenu(new System.Windows.Forms.MenuItem[] { new System.Windows.Forms.MenuItem("E&xit", new EventHandler(exit_Click)) });
            System.Threading.Thread check = new System.Threading.Thread(CheckEmail);
            check.Start();
        }
        private void Form1_Load(object sender, EventArgs e)
        {
            
        }
        private void exit_Click(object sender, EventArgs e)
        {
            stop = true;
            message = "Exiting, please wait...";
            ShowMessage();
        }
        public void CheckEmail()
        {
            //Pop3 pop3 = new Pop3("pop.gmail.com", 995, 1000);
            //pop3.SendCommand("USER ", false);
            //pop3.SendCommand("PASS ", true);
            //message = "Connected. Now watching...";
            //Invoke(new System.Windows.Forms.MethodInvoker(ShowMessage));
            //int i;
            //int count;
            //int index;
            //string response;
            //string subject;
            //System.IO.StreamReader input;
            //System.Net.HttpWebRequest request;
            while (!stop)
            {
                //response = pop3.SendCommand("STAT", false);
                System.Threading.Thread.Sleep(30000);
            }
            //pop3.SendCommand("QUIT", true);
            //Invoke(new System.Windows.Forms.MethodInvoker(Close));
        }
        private void ShowMessage() { icnNotify.ShowBalloonTip(2000, "BPOs' acceptor", message, System.Windows.Forms.ToolTipIcon.Info); }
    }


//а запуск
static class Program
    {
        /// <summary>
        /// The main entry point for the application.
        /// </summary>
        [STAThread]
        static void Main()
        {
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);
            new Form1();
            Application.Run();
        }
    }