Use the built-in EventHandler delegate : event « GUI Windows Forms « C# / CSharp Tutorial

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C# / CSharp Tutorial » GUI Windows Forms » event 
23.64.11.Use the built-in EventHandler delegate
using System; 
 
// Declare an event class. 
class MyEvent 
  public event EventHandler SomeEvent; // uses EventHandler delegate 
 
  // This is called to fire SomeEvent. 
  public void OnSomeEvent() { 
    if(SomeEvent != null
      SomeEvent(this, EventArgs.Empty)
  

 
class MainClass 
  static void handler(object source, EventArgs arg) { 
    Console.WriteLine("Event occurred")
    Console.WriteLine("Source is " + source)
  
 
  public static void Main() {  
    MyEvent evt = new MyEvent()
 
    // Add handler() to the event list. 
    evt.SomeEvent += handler; 
 
    // Fire the event. 
    evt.OnSomeEvent()
  
}
Event occurred
Source is MyEvent
23.64.event
23.64.1.Events
23.64.2.Using Event Accessors
23.64.3.Event and event handler
23.64.4.Use delegate to handle events
23.64.5.Fire event in property setter
23.64.6.Events: add and remove functions for a private delegate event
23.64.7.Events: add and remove functions
23.64.8.Events add and remove with synchronized block
23.64.9.Events: Custom Add and Remove with Global delegate cache.
23.64.10.A .NET-compatible event
23.64.11.Use the built-in EventHandler delegate
23.64.12.Use an anonymous method as an event handler
23.64.13.Ignored Parameters Anonymous Methods for Button click, kepressed and mouse clicked action
23.64.14.Events and form controls
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