void ChooseCategory(int Category)
    {
        switch (Category)
        {
        default:
            questionData = QuestionData.LoadFromText(questionDataXMLFileHistory1.text);
            break;

        case 1:
            questionData = QuestionData.LoadFromText(questionDataXMLFileHistory1.text);
            break;


        case 2:
            questionData = QuestionData.LoadFromText(questionDataXMLFileHistory2.text);
            break;


        case 3:
            questionData = QuestionData.LoadFromText(questionDataXMLFileHistory3.text);
            break;
        }
    }