回應 https://www.facebook.com/groups/155672014541120/permalink/922579324517048/

Composition.cs

class BasicObject
{
    public int hp { get; set; }
    public int mp { get; set; }
    public int attack { get; set; }
}

class PlayerData 
{
    BasicObject basic = new BasicObject();
    
    public BasicObject Basic { get{ return this.basic; } }
    // Others
}

class EnemyData 
{
    BasicObject basic = new BasicObject();
    
    public BasicObject Basic { get{ return this.basic; } }
    // Others
}

class FriendData 
{
    BasicObject basic = new BasicObject();
    
    public BasicObject Basic { get{ return this.basic; } }
    // Others
}

Override.cs

class BasicObject
{
    public int hp { get; set; }
    public int mp { get; set; }
    public int attack { get; set; }
}

class PlayerData : BasicObject
{
    // Others
}

class EnemyData : BasicObject
{
    // Others
}

class FriendData : BasicObject
{
    // Others
}