Error CS0019: Operator `==' cannot be applied to operands of type

I am getting this error while randomizing array.
Please check the attached image.

 

I believe

Code (CSharp):

1. unansweredQuestions == 0

is causing the error as you're trying to compare a List<T> to an Int.

 

Now it's showing this error.

ArgumentNullException: Argument cannot be null.
Parameter name: source
System.Linq.Check.Source (System.Object source)
System.Linq.Enumerable.ToList[QuestionData] (IEnumerable`1 source)
GameController.Start () (at Assets/Scripts/GameController.cs:45)

 

Shouldnt if(unansweredQuestions == 0 || unansweredQuestions.Count == 0) be,
if(unansweredQuestions==null). Plus you should really be either checking that after you try to initialize unansweredQuestions = question.ToList<QuestionData>(); , or instead check that if(questions!=null) to ensure that GetRandomQuestion() can run its logic on the unansweredQuestions Array.