private void btnAddStudent_Click(object sender, EventArgs e)
        {
            // Add Student Button on Add Contact Page
            // declaring variables

            name   = txtSName.Text.ToUpper();
            phone  = txtSPhone.Text;
            email  = txtSEmail.Text;
            status = "";
            if (rdoPostgrad.Checked)
            {
                status = "POSTRGAD";
            }
            else if (rdoUndergrad.Checked)
            {
                status = "UNDERGAD";
            }
            id = txtSID.Text;

            // check phone number entered correctly
            checkPhone = NumberCheck(phone);
            NumberPrint(checkPhone, "Phone");

            // check emails entered correctly
            checkEmails = EmailCheck(email);
            // if errors detected print out error
            EmailPrint(checkEmails);

            // check student id entered correctly
            checkNumbers = NumberCheck(id);
            NumberPrint(checkNumbers, "StudentID");

            // validation check
            checkFields = (InputCheck(name, phone, email, status, id));
            if (checkFields == 0 && checkEmails == 0 && checkPhone == 0 && checkNumbers == 0)
            {
                // use AddStudent method in Heavylifting class
                hl.AddStudent(name, phone, email, status, id);

                // clear entry point boxes
                txtSName.Clear();
                txtSPhone.Clear();
                txtSEmail.Clear();
                rdoPostgrad.Checked  = false;
                rdoUndergrad.Checked = false;
                txtSID.Clear();

                MessageBox.Show("Student Contact was added sucessfully.");
            }
            else if (checkFields == 1)
            {
                MessageBox.Show("Whoops, you forgot to enter 1 field. Please enter all the infomation for the Student Contact.");
            }
            else if (checkFields > 1)
            {
                MessageBox.Show(string.Format("Whoops, you forgot to enter {0} fields. Please enter all the infomation for the Student Contact.", checkFields));
            }
        }