Example of generic class/generic delegation

Using System;
Using System. Collections. Generic;
Using System. componentmodel;
Using System. text;
Using System. Windows. forms;

Namespace Deletegatet
{
Public   Partial   Class Form1: Form
{
Public Form1 ()
{
Initializecomponent ();
}

Private   Void Button#click ( Object Sender, eventargs E)
{
Myclass < String , String > _ Myclass =   New Myclass < String , String > (); // Instantiate a generic class myclass
_ Myclass. _ mydelegate =   New Mydelegate < String , String > (Demomethod ); // Instantiation _ generic delegation of myclass
MessageBox. Show (_ myclass. getvalues ( " Jimmy's book " , " Jimmy " )); // At this time, the compiler can determine that the parameter type is string, and then call the generic method demomethod by Delegate.


_ Myclass. _ myevent + =   New Myevent < String , String > (Demoevent < String , String > ); // Subscribe to an event for _ myclass
_ Myclass. invokeevent ( " Jimmy " , " China " ); // Event triggering
}


// Define a delegate with a return value
Public   Delegate   String Mydelegate < T, s > (T title, s author );

// Define event delegation.
Public   Delegate   Void Myevent < E, P > (E name, P address );

Public   Class Myclass < V, F >
{
// Delegate Declaration
Public Mydelegate < V, F > _ Mydelegate;
// Declare event Delegate
Public   Event Myevent < V, F > _ Myevent =   Null ;

Public   String Getvalues (V title, F author)
{
//Call delegate
Return_ Mydelegate (title, author );
}

Public Myclass ()
{
}

Public   Void Invokeevent (V name, F address)
{
If (_ Myevent ! =   Null )
{
//Call delegate
_ Myevent (name, address );
}
}
}


Public   String Demomethod < T, s > (T title, s author)
{
ReturnTitle. tostring ()+ ", Author:" +Author;
}

Private   Void Demoevent < V, F > (V name, F address)
{
MessageBox. Show (name+ "Come from" +Address );
}
}



}