private void buttonAdd_Click(object sender, EventArgs e)
{
Question question = new Question(textBoxDescription.Text, textBoxQuestion.Text, textBoxCorrectAnswer.Text, textBoxFalseAnswerFirst.Text, textBoxFalseAnswerSecond.Text, textBoxFalseAnswerThird.Text, comboBoxSubject.SelectedItem.ToString(), image);
DBOperations.AddQuestion(question);
}