using System;

public class Addressable{

    public String Address {get; set;}

    }

public class Sendable{

    public String Message {get; set;}

}

public class Person:Addressable{

    public String email;

    public string name;

    public Person (String email, String name){

        this.email = email;

        this.name = name;

        this.Address = email; 

    }

}

public class TextMessage:Sendable{

    public TextMessage(String message){

        this.Message = message;

    }

}

​

public class Email{

    public Addressable recipient;

    public Addressable sender;

    public Sendable message;

    public Email (Addressable recipient, Addressable sender, Sendable message){

        this.recipient = recipient;

        this.sender = sender;

        this.message = message;

    }

    public void Send(){

        Console.WriteLine("Sending Email"); 

        Console.WriteLine("[FROM: {0}]",sender.Address);    

        Console.WriteLine("[TO: {0}]",recipient.Address);

        Console.WriteLine("[MESSAGE: {0}]",message.Message);

    }

}

​

​

public class Program

{

    public static void Main()

    {

        Person Alice = new Person("alice@email.com", "Alice");

        Person Bob = new Person("bob@email.com", "Bob");

        TextMessage message = new TextMessage("Pedido de Informações");

        Email email = new Email(Alice,Bob,message);

        email.Send (); 

    }

}