using System;

​

public delegate void MyDelegate(string msg);

​

public class Program

{

    public static void Main()

    {

        MyDelegate del = ClassA.MethodA;

        InvokeDelegate(del);        

        del = ClassB.MethodB;

        InvokeDelegate(del);

        del = (string msg) => Console.WriteLine("Called lambda expression: " + msg);

        InvokeDelegate(del);

​

    }

    public static void InvokeDelegate(MyDelegate del)

    {

        del("Hello World");

    }

}

​

public class ClassA

{

    public static void MethodA(string message)

    {

        Console.WriteLine("Called ClassA.MethodA() with parameter: "+ message);

    }

}

​

public class ClassB

{

    public static void MethodB(string message)

    {

        Console.WriteLine("Called ClassB.MethodB() with parameter: "+ message);

    }

}