public enum WallOrientation
{
    Horizontal,
    Vertical
}

public enum WallType
{
    Empty,
    Full
}

public class Wall
{
    public Stage Stage { get; }
    public int X { get; }
    public int Y { get; }
    public WallOrientation Orientation { get; }

    WallType _type;
    public WallType Type
    {
        get => _type;
        set
        {
            _type = value;
            Stage.OnWallChanged?.Invoke(this);
        }
    }

    public Wall(Stage stage, int x, int y, WallOrientation orientation)
    {
        Stage = stage;
        X = x;
        Y = y;
        Orientation = orientation;
    }
    
}