1 namespace Microshaoft
2 {
3 using System;
4 using System.Linq;
5 using System.Drawing;
6 using System.Collections.Generic;
7 using System.Windows.Forms;
8 public class Form1 : Form
9 {
10 static void Main()
11 {
12 Application.Run(new Form1());
13 }
14 //private List<Action<object, EventArgs>> _actions = null;
15 //private List<EventHandler> _eventHandlers = null;
16 private Button button1;
17 public Form1()
18 {
19 button1 = new Button();
20 button1.Text = "button1";
21 Controls.Add(button1);
22
23 var actions = new List<Action<object, EventArgs>>();
24 //_actions = actions;
25 var eventHandlers = new List<EventHandler>();
26 //_eventHandlers = eventHandlers;
27 //int i = 1;
28 EventHandler eh;
29 eh = new EventHandler
30 (
31 (x, y) =>
32 {
33 MessageBox.Show("Lambda1");
34 DisposeHandlersAllProcesses(eventHandlers);
35 }
36 );
37 eventHandlers.Add(eh);
38 eventHandlers.Add(eh);
39 //_actions.Add(eh);
40 //_actions.Add(eh);
41 eventHandlers
42 //_actions
43 .ForEach
44 (
45 (x) =>
46 {
47 button1.Click += eh;
48 button1.Click +=
49 (
50 (xx, yy) =>
51 {
52 MessageBox.Show("Lambda2");
53 DisposeHandlersAllProcesses(eventHandlers);
54 }
55 );
56 }
57 );
58 button1.Click -= eh;
59 eh = null;
60 DisposeHandlersAllProcesses(eventHandlers);
61 //(EventHandler) _action;
62 //new EventHandler
63 }
64 //private void DisposeHandlersAllProcesses(List<Action> handlers)
65 private void DisposeHandlersAllProcesses(List<EventHandler> handlers)
66 {
67 handlers
68 //_actions
69 .ForEach
70 (
71 (x) =>
72 {
73 var invocations = x.GetInvocationList();
74 Array.ForEach
75 (
76 invocations
77 , (xx) =>
78 {
79 x -= (EventHandler)xx;
80 Console.WriteLine("{0}:{1}", x, xx);
81 }
82 );
83 x = null;
84 }
85 );
86 }
87 }
88 }
