public void LoadQuestionFile(string _filePath)
 {
     QuestionsInSet.Clear();
     NumberOfAnsweredQuestions = 0;
     QuestionsRandomlyChoosenForTest.Clear();
     using (StreamReader sr = new StreamReader(_filePath))
     {
         string _questionLine;
         while ((_questionLine = sr.ReadLine()) != null)
         {
             if (!_questionLine.Contains(';'))
             {
                 NumberOfQuestionsForThisTest = int.Parse(_questionLine);
             }
             else
             {
                 string[] _questionElements = _questionLine.Split(';');
                 Question _question         = new Question(_questionElements[0], _questionElements[1], _questionElements[2], _questionElements[3], int.Parse(_questionElements[4]));
                 QuestionsInSet.Add(_question);
             }
         }
     }
     if (NumberOfQuestionsForThisTest == 0)
     {
         throw new Exception("Soubor otázek neobsahuje počet otázek vygenerovaných pro každý test. Nemůžu proto pokračovat.");
     }
     ChooseQuestionsForTest();
 }
 public void ChooseQuestionsForTest()
 {
     while (QuestionsRandomlyChoosenForTest.Count < NumberOfQuestionsForThisTest)
     {
         Random r         = new Random();
         int    _question = r.Next(QuestionsInSet.Count);
         if (!QuestionsRandomlyChoosenForTest.Contains(QuestionsInSet[_question]))
         {
             QuestionsRandomlyChoosenForTest.Add(QuestionsInSet[_question]);
         }
     }
 }