C#

static void Main()

class Program
    {
        
        static void Main(string[] args)
        {
            Program p = new Program();
            p.MyMethod();
        }
        void MyMethod()
        {
            NotifyIcon tray = new NotifyIcon();
            tray.Icon = new Icon("MyIcon.ico");
            tray.Visible = true;
            tray.MouseClick += new MouseEventHandler(tray_MouseClick);
            tray.Click += new EventHandler(tray_Click);
            tray.DoubleClick += new EventHandler(tray_DoubleClick);
            Console.Read();
        }
public void tray_MouseClick(object sender, MouseEventArgs e)
        {
            Process.Start(@"C:\Windows\Notepad");
            Console.WriteLine("Hello World!");
        }
        public void tray_Click(object sender, EventArgs e)
        {
            Console.WriteLine("Hello World!");
        }
        public void tray_DoubleClick(object sender, EventArgs e)
        {
            Console.WriteLine("Hello World!");
        }
    }