两个类之间的C＃委托和事件处理程序

Question

I'm learning delegate and event hadler because i need in my code. In the example, the Class Test generates the message Hello, i'm an event!
From this Class i need to call the method Evento1 in Class Test1, to generate the message Hello, i'm another event! But i'm not able to do it.
I tryed to instantiate the Class Test1 and call the method. The debuger compile but the second message don't appear.

namespace Eventi1
{
    // Delegate declaration
    delegate void testEventHandler(object source, string message);
    class Test
    {
        // Event
        public event testEventHandler testEvento;

        // Function that triggers the event
        public void Evento(string message)
        {
            Console.WriteLine("Event!");
            if (testEvento != null)
            { testEvento(this, message); }

            Test1 evento = new Test1();
            evento.Evento1("Hello, i'm another event!");
        }
    }

    class Test1
    {
        // Event1
        public event testEventHandler testEvento;

        // Function that triggers the event
        public void Evento1(string message)
        {
            Console.WriteLine("Event1!");
            if (testEvento != null)
            { testEvento(this, message); }
        }
    }

    public class EventSample
    {
        // Constructor
        public EventSample() { }
        static void Main()
        {
            // Classe instantiation
            Test b = new Test();

            // Event handler
            //b.testEvento += new testEventHandler(onTestAction);
            b.testEvento += onTestAction;

            // Event invocation
            b.Evento("Hello, i'm an event!");
        }

        // Function that triggers the event
        public static void onTestAction(object source, string message)
        {
            Console.WriteLine("We're inside the event handler.");
            Console.WriteLine("Messagge: " + message);
            Console.ReadLine();
        }
    }
}

PS second question to Aansari

class Test
{
    public delegate void testEventHandler(object source, string message);
    public event testEventHandler testEvento;

    // Function that triggers the event
    public void Evento(string message)
    {
        Console.WriteLine("Event!");
        if (testEvento != null)
        { testEvento(this, message); }

        Test1 evento = new Test1();
        evento.testEvento += testEvento;
        evento.Evento1();
    }
}

class Test1
{
    public delegate void testEventHandler(object source, string message);
    public event testEventHandler testEvento;

    // Function that triggers the event1
    public void Evento1()
    {
        Console.WriteLine("Event1!");
        if (testEvento != null)
        { testEvento(this, "Hello, i'm another event!"); }
    }
}

public class EventSample
{
    public EventSample() { }
    static void Main()
    {
        Test b = new Test();
        b.testEvento += onTestAction;
        b.Evento("Hello, i'm an event!");
    }

    // Function that triggers the event
    public static void onTestAction(object source, string message)
    {
        Console.WriteLine("We're inside the event handler.");
        Console.WriteLine("Messagge: " + message + "\n");
        Console.WriteLine("Press ENTER");
        Console.ReadLine();
    }
}

Answer 1

Incorporate the following change and it will give you expected result

Test1 evento = new Test1();
evento.testEvento += testEvento;
evento.Evento1("Hello, i'm another event!");

The problem in your code was, though you were assigning event handling method to Test class event handler, you were not assigning any event handling method to Test1 class event handler.