private void CountDown()
        {
            while (timer > 0.0)
            {
                try
                {
                    Thread.Sleep(100);
                    timer -= 0.1;
                    // timer -= 1;
                    delUpdateUITextBox DelUpdateUITextBox = new delUpdateUITextBox(UpdateClock);
                    this.timeLabel.BeginInvoke(DelUpdateUITextBox, Math.Round(timer, 1).ToString());
                }
                catch (Exception e) {
                    break;
                }
            }
            EndForm endForm = new EndForm(user, "Czas się skończył!\n" + "Odpowiedziałęś na " + correctAnswers.ToString() + " z 10 pytań poprawnie!", correctAnswers, 0.0, stream);

            try
            {
                this.Invoke((MethodInvoker) delegate
                {
                    endForm.Show();
                    this.Close();
                });
            }
            catch (Exception e)
            { }

            //var delUpdateBox = new delUpdateUITextBox(UpdateClock);
        }
        //SPRAWDZANIE ODPOWIEDZI

        private void Answer(Button button)
        {
            answeredQuestions++;
            aButton.Enabled = false;
            bButton.Enabled = false;
            cButton.Enabled = false;
            dButton.Enabled = false;

            button.Enabled = true;

            if (button.Text == correctAnswer)
            {
                button.BackColor = Color.Green;
                correctAnswers++;
            }
            else
            {
                button.BackColor = Color.Red;
            }
            button.Update();
            Thread.Sleep(20);
            Thread.Sleep(2000);
            string timeLeft = timeLabel.Text.Replace("Pozostały czas: ", "").Replace(" sekund", "");

            timer = Convert.ToDouble(timeLeft);


            aButton.Enabled = true;
            bButton.Enabled = true;
            cButton.Enabled = true;
            dButton.Enabled = true;
            if (answeredQuestions == 10)
            {
                timeLeft = timeLabel.Text;

                //timerThread.Abort();
                EndForm endForm = new EndForm(user, "Odpowiedziano na " + correctAnswers.ToString() + " z 10 pytań poprawnie!", correctAnswers, timer, stream);
                endForm.Show();
                this.Close();
            }
            else
            {
                correctAnswer = LoadQuestion();
            }
        }