static void Main(string[] args)
        {
            System.Windows.Forms.Button btn = new System.Windows.Forms.Button();
            btn.Click += new EventHandler(btn_Click);
            btn.Click += new EventHandler(btn_Click2);
            btn.Click += new EventHandler(btn_Click3);
            PropertyInfo pi = btn.GetType().GetProperty("Events", BindingFlags.Instance | BindingFlags.NonPublic);
            EventHandlerList ehl = (EventHandlerList)pi.GetValue(btn, null);
            FieldInfo fieldInfo = (typeof(System.Windows.Forms.Control)).GetField("EventClick", BindingFlags.Static | BindingFlags.NonPublic);
            Delegate d = ehl[fieldInfo.GetValue(null)];
            foreach (Delegate del in d.GetInvocationList())
                Console.WriteLine(del.Method.Name);
        }

        static void btn_Click(object sender, EventArgs e)
        {
            Console.WriteLine("Click1");
        }

        static void btn_Click2(object sender, EventArgs e)
        {
            Console.WriteLine("Click2");
        }

        static void btn_Click3(object sender, EventArgs e)
        {
            Console.WriteLine("Click3");
        }