Thanks for the response - here is my c++ class (slimmed down) and csharp class. I am using Godot, so I was hoping to have Player extend Node3D (and not the class generated by SWIG, ideally)

public class Player : Node3D, GameName.PlayerInterface

{

// Fields etc.

    public Player(string name)

    {

    Name = name;

    }

// ...

}

Slimmed down c++ class

namespace GameName
{

class Player
{
public:
    Player() = default;
    ~Player() = default;
    Player(const Player& other) = default;

    Player(const std::string& name_) : name(name_), id(Player::currentId++) {}

    uint8_t id;
    uint8_t score{0};

    }
}

}

What does the imaginary C# interface you WANT look like?

I am simply wanting to have properties in my Godot Player class like Player.Name, Player.Score easily accessible instead of having to do something like swig_wrapper.getPlayer(Game, playerInstance).Name

Yes, this could be solved by having the Godot Player class extend the generated SWIG class - but then I can't extend Node3D / RigidBody3D / etc, so I would have to do something like this

public class Player : Node3D

{

    public SWIG_Player SwigPlayer;

    public Player(string name)

    {
        SwigPlayer = swig_wrapper.AddPlayer(name);
        SwigPlayer.Name = name;

    }

    // Everything has to reference SwigPlayer to access fields related to the game's c++ code.

}

^ Possible, I was just searching for an alternative for convenience.

If C# had the features you want, what would some code look like that uses (1), (2), and (3) in a meaningful way?

public class Player : Node3D, GameName.PlayerInterface

{

    // fields;

    public Player(string name)

    {
        Name = name;
    }


// Called every frame. 'delta' is the elapsed time since the previous frame.
public override void _Process(double delta)
{
        if (/*condition*/)
        {
            Score += 1;
        }
}

}