using System;

namespace ZoneSim

{

    public class Program

    {

        class Bitard

        {

            public string name;

            public Bitard(string n) {

                name = n;

            }

            public void Say() {

                Console.WriteLine(name);

            }

        }

​

        static void  DownGrade1(ref Bitard b ) 

        {

            b.name = "Маша";

        }

        static void DownGrade2(Bitard b)

        {

            b.name = "Валя";

        }

        public static void Main(string[] args)

        {

            Bitard b1 = new Bitard("Миша");

            Bitard b2 = new Bitard("Вася");

            b1.Say();

            b2.Say();

            DownGrade1(ref b1);

            DownGrade2(b2);

            b1.Say();

            b2.Say();

            //Console.ReadKey();

        }

    }

}