public void onOKBtnClickEvent(object sender, EventArgs e)
        {
            if (!(HClConcentrate.Text.Contains("-") ||
                  NaOHConcentrate.Text.Contains("-") ||
                  KOHConcentrate.Text.Contains("-")) ||
                standardVolume.Text.Contains("-") ||
                maxBeakerVolume.Text.Contains("-"))
            {
                try
                {
                    currentBeaker.setConcentrationRatio(new int[3]
                    {
                        Convert.ToInt32(HClConcentrate.Text),
                        Convert.ToInt32(NaOHConcentrate.Text),
                        Convert.ToInt32(KOHConcentrate.Text)
                    });

                    currentBeaker.setStandardVolume(Convert.ToInt32(standardVolume.Text));
                    currentBeaker.setMaxVolume(Convert.ToInt32(maxBeakerVolume.Text));
                }
                catch (FormatException)
                {
                    MessageBox.Show("There's an invaild number somewhere. please check it out.", "Oops!");
                }
                catch (OverflowException)
                {
                    MessageBox.Show("One of given number is too big. please check it out.", "Oops!");
                }
            }
            else
            {
                MessageBox.Show("Every number should be greater than 0.", "Oops!");
            }

            Close();
        }