清理(委托类型实例)事件处理(实例)的函数及Lambda表达式

namespace Microshaoft
{
    using System;
    using System.Linq;
    using System.Drawing;
    using System.Collections.Generic;
    using System.Windows.Forms;
    public class Form1 : Form
    {
        static void Main()
        {
            Application.Run(new Form1());
        }
        //private List<Action<object, EventArgs>> _actions = null;
        //private List<EventHandler> _eventHandlers = null;
        private Button button1;
        public Form1()
        {
            button1 = new Button();
            button1.Text = "button1";
            Controls.Add(button1);
            
            var actions = new List<Action<object, EventArgs>>();
            //_actions = actions;
            var eventHandlers = new List<EventHandler>();
            //_eventHandlers = eventHandlers;
            //int i = 1;
            EventHandler eh;
            eh = new EventHandler
                            (
                                (x, y) =>
                                {
                                    MessageBox.Show("Lambda1");
                                    DisposeHandlersAllProcesses(eventHandlers);
                                }
                            );
            eventHandlers.Add(eh);
            eventHandlers.Add(eh);
            //_actions.Add(eh);
            //_actions.Add(eh);
            eventHandlers
                //_actions
                .ForEach
                                (
                                    (x) =>
                                    {
                                        button1.Click += eh;
                                        button1.Click +=
                                                    (
                                                        (xx, yy) =>
                                                        {
                                                            MessageBox.Show("Lambda2");
                                                            DisposeHandlersAllProcesses(eventHandlers);
                                                        }
                                                    );
                                    }
                                );
            button1.Click -= eh;
            eh = null;
            DisposeHandlersAllProcesses(eventHandlers);
            //(EventHandler) _action;
            //new EventHandler
        }
        //private void DisposeHandlersAllProcesses(List<Action> handlers)
        private void DisposeHandlersAllProcesses(List<EventHandler> handlers)
        {
            handlers
                //_actions
                    .ForEach
                        (
                            (x) =>
                            {
                                var invocations = x.GetInvocationList();
                                Array.ForEach
                                        (
                                            invocations
                                            , (xx) =>
                                            {
                                                x -= (EventHandler)xx;
                                                Console.WriteLine("{0}:{1}", x, xx);
                                            }
                                        );
                                x = null;
                            }
                        );
        }
    }
}