private void btRemoveCertificateType_Click(object sender, EventArgs e)
        {
            CertificateType member = BLCertificateType.GetAll().Last();

            int rows = BLCertificateType.Remove(member);

            MessageBox.Show(rows.ToString());
        }
        private void btUpdateCertificateType_Click(object sender, EventArgs e)
        {
            CertificateType member = BLCertificateType.GetAll().Last();

            member.CertificateTypeName = member.CertificateTypeName + "Update";
            int rows = BLCertificateType.Update(member);

            MessageBox.Show(rows.ToString());
        }
        private void btGetAllCertificateTypes_Click(object sender, EventArgs e)
        {
            List <CertificateType> list = BLCertificateType.GetAll();

            if (list == null)
            {
                MessageBox.Show("failed");
            }
            else
            {
                MessageBox.Show(list.Count.ToString());
            }
        }