using System;

public class Program

{

    static void ChangeString(string s){

        s= "Hi";

        Console.WriteLine("ChangeString value: {0}",s);

    }

    static void ChangeInt(int i){

        i= 2;

        Console.WriteLine("ChangeInt value: {0}",i);

    }

    static void ChangeArray(int[] ia){

        ia = new int[]{1,2,3};

        Console.WriteLine("ChangeArray value: {0}",ia[0]);

    }

    public static void Main()

    {

        string name = "ido";

        int age = 45;

        int[] ages = {21,3,15};

        //

        ChangeString(name);

        ChangeInt(age);

        ChangeArray(ages);

        //

        Console.WriteLine("Main values: {0},{1},{2}",name,age,ages[0]);

    }

}