Minimize to tray [duplicate]

Answer 1

Handle the form’s Resize event. In this handler, you override the basic functionality of the Resize event to make the form minimize to the system tray and not to the taskbar. This can be done by doing the following in your form’s Resize event handler:

1. Check whether the form’s WindowState property is set to FormWindowState.Minimized. If yes, hide your form, enable the NotifyIcon object, and show the balloon tip that shows some information.
2. Once the WindowState becomes FormWindowState.Normal, disable the NotifyIcon object by setting its Visible property to false.
3. Now, you want the window to reappear when you double click on the NotifyIcon object in the taskbar. For this, handle the NotifyIcon’s MouseDoubleClick event. Here, you show the form using the Show() method.

In the form resize event, do the check there and hide the form

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

Then when clicking on the taskbar icon just restore it.

private void notifyIcon_Click(object sender, EventArgs e)
{
    this.Show();
    this.WindowState = FormWindowState.Normal;
}

Refer:
How do I minimize a WinForms application to the notification area?
minimize app to system tray

Answer 2

Use following code:

if (WindowState == FormWindowState.Minimized)
        {
            this.Hide();
        }

When you minimize the form, simply hide it. You will have to implement above code in Form_Resize event.

Then on clicking taskbar icon just restore its state as follows:

private void notifyIcon_Click(object sender, EventArgs e)
    {
        this.Show();
        this.WindowState = FormWindowState.Normal;
    }

You will need to use notifyIcon_Click event for this purpose.

Hope its helpful.