1 using System;
 2 namespace ConsoleApp1
 3 {
 4     class eventTest
 5     {
 
 6                 // 聲明委托
 7                 public delegate void EventHander(object sender, EventArgs e);
 8                 public string sex { get; set; } = "man";
 9                 
10                 // 定義事件，基於委托
11                 public event EventHander GoToilet;
12                 // 觸發事件
13
 
                 public void OnEvent(EventArgs e)
14                 {
15                         if(this.GoToilet != null)
16                         {
17                                 this.GoToilet(this, e);
18                         }
19                 }
20                 public static
 
 void Toilet(object sender, EventArgs e)
21                 {
22                         var core = (eventTest)sender;
23                         Console.WriteLine("please enter " + core.sex + " toilet");
24                 }
25                 static void Main(string[] args)
26                 {
27                         var et = new eventTest();
28                         et.GoToilet += new EventHander(Toilet);
29                         while (true)
30                         {
31                                 et.OnEvent(null);
32                                 Console.ReadKey();
33                         }
34                 }
35         }
36 }

結果

C#-事件（十八）