Hide .NET Winform application in tray when minimized

First drop a NotifyIcon onto the winform and name it "notifyIcon", add a mouse double click event handler for the notifyIcon to the winform as shown below:

private void notifyIcon_MouseDoubleClick(object sender, MouseEventArgs e)
{
 ShowApp();
}

private void ShowApp()
{
 this.WindowState = FormWindowState.Maximized;
 this.ShowInTaskbar = true;
 this.Show();
}

This will ensure that when the notifyIcon in the system tray is clicked, the application will be shown. Next add a resize event handler to the winform as shown below:

private void FrmCrawler_Resize(object sender, EventArgs e)
{
 if (FormWindowState.Minimized == this.WindowState)
 {
  this.ShowInTaskbar = false;
  this.Hide();
 }
}

This is triggered when user click the minimize icon on the winform app, which in turns hide the app.