using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

        ProxyGamePlayer proxyGamePlayer = new ProxyGamePlayer("Zhangsan");

        proxyGamePlayer.Login("zhangsan","123");

        proxyGamePlayer.KillBoss();

        proxyGamePlayer.Upgrade();

    }

}

​

public interface IGamePlayer

{

    void Login(string user, string password);

    void KillBoss();

    void Upgrade();

}

​

public class GamePlayer

{

    private string name;

    public GamePlayer(ProxyGamePlayer proxyGamePlayer,string name)

    {

        if (proxyGamePlayer == null)

        {

            Console.WriteLine("You could not create role yourself");

        }else

        {

            this.name=name;

        }

    }

    public void Login(string user,string password)

    {

        Console.WriteLine(this.name + " has login.");

    }

    public void KillBoss()

    {

        Console.WriteLine(this.name + "You have killed a boss.");

    }

    public void Upgrade()

    {

        Console.WriteLine(this.name + "You have upgraded.");

    }

}

​

public class ProxyGamePlayer

{

    private GamePlayer player;

    public ProxyGamePlayer(string name)

    {

        this.player = new GamePlayer(this,name);

    }

    public void Login(string user,string password)

    {

        this.player.Login(user,password);

    }

    public void KillBoss()

    {

        this.player.KillBoss();

    }

    public void Upgrade()

    {

        this.player.Upgrade();

    }

}