using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

        var  x = new Animal();

        DoItByVal( x);

        Console.WriteLine(x.Name);

        DoItByRef(ref x);

        Console.WriteLine(x.Name);

    }

    public static void DoItByRef( ref Animal anim)

        {

            anim = null;

        }

    public static void DoItByVal(  Animal anim)

        {

            anim = null;

        }

    public class Animal

    {

        public string Name ="sausage";

    }

}