Question

Hy!

I want to make a cardgame in c#
The debugger always throws a NullPointerException.
But the var card isn’t null (it has a value shown during the debugging)
The problem have to be in cards.add().

My Code:

namespace Uno_Logic
{
    class CardStack
    {
        private List<Card> cards;
        public void Cardstack()
        {
            cards = new List<Card>();
        }
        public void fillCardstack ()
        {
            for (Card_Value value = Card_Value.One; value <= Card_Value.DrawTwo; value++)
            {
                for (Card_Colour colour = Card_Colour.Yellow; colour < Card_Colour.Black; colour++)
                {
                    Card card = new Card(colour, value);
                    Card card2 = new Card(colour, value);
                    cards.Add(card); //**here throws the debugger the Exception**
                    cards.Add(card2);
                }

            }
         }
      }
   }

Please help!

Answer 1

replace:

    public void CardStack()
    {
        cards = new List<Card>();
    }

with

    public CardStack()
    {
        cards = new List<Card>();
    }

constructors in c# has no return type