using System;

​

public sealed class Player

{

    public Player(string name, long score)

    {

        Name = name;

        Score = score;

        Id = Guid.NewGuid().ToString();

    }

    public string Name { get; private set; }

    public string Id { get; private set; }

    public long Score { get; private set; }

}

public sealed class PlayerDTO

{

    public PlayerDTO(string name, long score, string id)

    {

        Name = name;

        Score = score;

        Id = id;

    }

    public string Name { get; private set; }

    public string Id { get; private set; }

    public long Score { get; private set; }

    public static implicit operator PlayerDTO(Player player)

    {

        return new PlayerDTO(player.Name, player.Score, player.Id);

    }

}

​

Action<PlayerDTO> print = p => Console.WriteLine("{0}'s score is {1}", p.Name, p.Score);

​

var player = new Player("Yan", 42);

​

print(player);  // Yan's score is 42

​

PlayerDTO dto = new Player("Yan", 42); // implicit conversion on assigment

​

​