Обработка событий в .NET с помощью C#

using System;
// Шаг 1. Определение делегата с сигнатурой связываемого метода
public delegate void MyDelegate(string input);

// Шаг 2. Определение метода с сигнатурой определенного делегата
class MyClass1{ public void delegateMethod1(string input){ Console.WriteLine( "This is delegateMethod1 and the input to the method is {0}", input); } public void delegateMethod2(string input){ Console.WriteLine( "This is delegateMethod2 and the input to the method is {0}", input); }
}

// Шаг 3. Создание объектов делегата и связывание с методами 
class MyClass2{ public MyDelegate createDelegate(){ MyClass1 c2=new MyClass1(); MyDelegate d1 = new MyDelegate(c2.delegateMethod1); MyDelegate d2 = new MyDelegate(c2.delegateMethod2); MyDelegate d3 = d1 + d2; return d3; }
}

// Шаг 4. Вызов метода с помощью делегата
class MyClass3{ public void callDelegate(MyDelegate d,string input){ d(input); }
}
class Driver{ static void Main(string[] args){ MyClass2 c2 = new MyClass2(); MyDelegate d = c2.createDelegate(); MyClass3 c3 = new MyClass3(); c3.callDelegate(d,"Calling the delegate"); }
}

public class MyEventArgs EventArgs{ public string m_myEventArgumentdata;
}

using System;
// Шаг 1
public delegate void MyHandler1(object sender,MyEventArgs e);
public delegate void MyHandler2(object sender,MyEventArgs e);

// Шаг 2
class A{ public const string m_id="Class A"; public void OnHandler1(object sender,MyEventArgs e){ Console.WriteLine("I am in OnHandler1 and MyEventArgs is {0}", e.m_id); } public void OnHandler2(object sender,MyEventArgs e){ Console.WriteLine("I am in OnHandler2 and MyEventArgs is {0}", e.m_id); }
 // Шаг 3 public A(B b){ MyHandler1 d1=new MyHandler1(OnHandler1); MyHandler2 d2=new MyHandler2(OnHandler2); b.Event1 +=d1; b.Event2 +=d2; }
}

// Шаг 4
class B{ public event MyHandler1 Event1; public event MyHandler2 Event2; public void FireEvent1(MyEventArgs e){ if(Event1 != null){ Event1(this,e); } } public void FireEvent2(MyEventArgs e){ if(Event2 != null){ Event2(this,e); } }
}
public class MyEventArgs EventArgs{ public string m_id;
}
public class Driver{ public static void Main(){ B b= new B(); A a= new A(b); MyEventArgs e1=new MyEventArgs(); MyEventArgs e2=new MyEventArgs(); e1.m_id ="Event args for event 1"; e2.m_id ="Event args for event 2"; b.FireEvent1(e1); b.FireEvent2(e2); }
}

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;

public class MyForm Form{ private Button m_nameButton; private Button m_clearButton; private Label m_nameLabel;
 private Container m_components = null;
 public MyForm(){ initializeComponents(); } private void initializeComponents(){ m_nameLabel=new Label(); m_nameButton = new Button(); m_clearButton = new Button();
 SuspendLayout();
 m_nameLabel.Location=new Point(16,16); m_nameLabel.Text="Click NAME button, please"; m_nameLabel.Size=new Size(300,23);
 m_nameButton.Location=new Point(16,120); m_nameButton.Size=new Size(176, 23); m_nameButton.Text="NAME";
 m_nameButton.Click += new System.EventHandler(NameButtonClicked);
 m_clearButton.Location=new Point(16,152); m_clearButton.Size=new Size(176,23); m_clearButton.Text="CLEAR";
 m_clearButton.Click += new System.EventHandler(ClearButtonClicked);
 this.ClientSize = new Size(292, 271); this.Controls.AddRange(new Control[] {m_nameLabel, m_nameButton, m_clearButton}); this.ResumeLayout(false); }
 private void NameButtonClicked(object sender, EventArgs e){ m_nameLabel.Text= "My name is john, please click CLEAR button to clear it"; } private void ClearButtonClicked(object sender,EventArgs e){ m_nameLabel.Text="Click NAME button, please"; } public static void Main(){ Application.Run(new MyForm()); }