using System;

using System.Linq; // for Enumerable

public class Program

{

    public static void Main()

    {

        // A variable b, just to hold the return value;

        int n = 0;

        // Calling methods the usual way

        JustAMethod();

        n = MethodReturningInt();

        MethodWithParam(422);

        Console.WriteLine(Enumerable.Repeat<char>('-', 80).ToArray()); // difficult way to do `new String('-', 80)`

        // Defining "aliases" using Action and Func

        Action PointingToJustAMethod = new Action(JustAMethod);

        Func<int> PointingToMethodReturningInt = new Func<int>(MethodReturningInt);

        Action<int> PointingToMethodWithParam = new Action<int>(MethodWithParam);

        // Calling the functions through the "aliases"

        PointingToJustAMethod();

        n = PointingToMethodReturningInt();

        PointingToMethodWithParam(422);

    }

    public static void JustAMethod() {

        Console.WriteLine("I am just a method with no return value and no parameters.");    

    }

    public static int MethodReturningInt() {

        Console.WriteLine("I'm a method with a boolean return value and no parameters.");

        return 42;

    }

    public static void MethodWithParam(int number) {

        Console.WriteLine("I'm a method with no return value and an integer parameter ({0}).", number);

    }

}