2022 - No error message is displayed if the user attempts to play two consecutive cards of the same tool type

You will first need to find the PlayCardToSequence method in the BreakThrough Class:

 private void PlayCardToSequence(int cardChoice)
        {
            if (Sequence.GetNumberOfCards() > 0)
            {
                if (Hand.GetCardDescriptionAt(cardChoice - 1)[0] != Sequence.GetCardDescriptionAt(Sequence.GetNumberOfCards() - 1)[0])
                {
                    Score += MoveCard(Hand, Sequence, Hand.GetCardNumberAt(cardChoice - 1));
                    GetCardFromDeck(cardChoice);
                }
            }
            else
            {
                Score += MoveCard(Hand, Sequence, Hand.GetCardNumberAt(cardChoice - 1));
                GetCardFromDeck(cardChoice);
            }
            if (CheckIfLockChallengeMet())
            {
                Console.WriteLine();
                Console.WriteLine("A challenge on the lock has been met.");
                Console.WriteLine();
                Score += 5;
            }
        }

The second if statement above is what stop you playing a card of the same type as the previous.

What you need to do

• Add an else condition to the if statement.