MailDispatcher and NotifyIcon

   
  


<Window x:Class="ActivationSample.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="ActivationSample"
    >
  <Grid>
    <ListBox Name="mailListBox" />
  </Grid>
</Window>
//File:Window.xaml.cs
using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Shapes;
using System.Windows.Forms;
using System.Windows.Threading;

namespace ActivationSample
{
    public partial class MainWindow : Window
    {
        private bool isActive;
        private MailDispatcher mailDispatcher = new MailDispatcher();
        private NotifyIcon newMailNotifyIcon = new NotifyIcon();

        public MainWindow()
        {
            InitializeComponent();

            this.mailDispatcher.MailDispatched += mailDispatcher_MailDispatched;
            this.mailDispatcher.Start();
           // this.newMailNotifyIcon.Icon = ActivationSample.Properties.Resources.NewMailIcon;            
            this.isActive = true;
            this.newMailNotifyIcon.Visible = false;

        }

        public void AddMailItem(string data)
        {
            this.mailListBox.Items.Add(data);
        }

        void mailDispatcher_MailDispatched(object sender, EventArgs e)
        {
            ((MainWindow)this).AddMailItem(DateTime.Now.ToString());
            if (!this.isActive &amp;&amp; this.newMailNotifyIcon.Visible == false)
            {
                this.newMailNotifyIcon.Visible = true;
            }
        }
//        void App_Deactivated(object sender, EventArgs e)
  //      {
    //        this.isActive = false;
      //  }

//        void App_Exit(object sender, ExitEventArgs e)
  //      {
    //        this.mailDispatcher.Stop();
      //  }        
    }

    public class MailDispatcher
    {
        DispatcherTimer timer;

        public event EventHandler MailDispatched;

        public void Start()
        {
            this.timer = new DispatcherTimer();
            timer.Tick += timer_Tick;
            timer.IsEnabled = true;
            timer.Interval = new TimeSpan(0, 0, 5);
        }

        public void Stop()
        {
            this.timer.IsEnabled = false;
            this.timer.Tick -= timer_Tick;
            this.timer = null;
        }

        void timer_Tick(object sender, EventArgs e)
        {
            if (MailDispatched != null) MailDispatched(this, EventArgs.Empty);
        }
    }    
}