Detailed Explanation of EventHandler Example in C

No more nonsense, the specific details are as follows:

// This defines the 1 Water tank type 
public class  Water tank 
{
  // This is the water discharge operation of the water tank 
  public void  Discharge water () { }
  // This is the property of the water tank 
  public double  Volume ;
  // This is an event where the water tank is empty 
  public event EventHandler  Empty water tank ;
}
// This defines the 1 Water feeder class 
public class  Water feeder 
{
  public void  Add water (Object sender, EventArgs e)
  {
    // Add water to the water tank that needs to be added 
  }
}
 public class User
{
  public User()
  {
    // Instantiate the water tank class 
     Water tank 1 = new  Water tank ();
    // Instantiate water feeder class 
     Water feeder 1 = new  Water feeder ();
    // Water heater registered empty water tank event 
     Water tank 1. Empty water tank  += new EventHandler( Water feeder 1. Add water );
  }
  private  Water feeder   Water feeder 1;
  private  Water tank   Water tank 1;
}

--------------------------------------------------------------------------------------------

The most classic explanation of C # delegation:

Examples:

this.Activated += new EventHandler(Form1_Activated);

This is the principle of a delegate.

this.Activated= You finish your meal ;  
Form1_Activated= Call me 1 Sound 

The meaning of this sentence is to put these two things in one, which means to call me once you have finished eating. I entrust you to call me once you have finished your meal. In this way, I don't have to come to see if you have finished eating. I have entrusted you.