// INSTRUCTIONS:

​

// The Questionnaire class has `Question` with a `IsValid` property 

// used to calculate the Risk score of the questionnaire.

​

// Refactor the code so we can calculate the scoring of the example (hint answer is two).

// Write as many as unit test you'd need to ensure (NUnit) that your code solves the requirement 

// and avoid any regressions in the future.

​

using NUnit.Framework;

​

public class Program

{

    public static void Main()

    {

        var test = new QuestionnaireTests();

        test.Run();

    }

    class QuestionnaireTests {

        public void Run() {

            var questionnaire = new Questionnaire {

                Questions = new [] {

                        new Question(),

                        new Question { IsValid = true },

                        new Question { IsValid = true }

                }

            };

            //Assert.That(..., Is.EqualTo(2));

        }

    }

    class Questionnaire {

        public Question[] Questions { get;set;}

    }

    class Question { 

        public bool IsValid { get;set;}

    }

}