private void buttonDelete_Click(object sender, EventArgs e)
        {
            UpdateDeleteCoursePresenter updateCoursePresenter = new UpdateDeleteCoursePresenter(this);
            int id = Convert.ToInt32(textBoxID.Text);

            if (MessageBox.Show("Are you sure you want to delete this student?", "Delete student", MessageBoxButtons.YesNo, MessageBoxIcon.Question) == DialogResult.Yes)
            {
                ;
            }
            {
                if (updateCoursePresenter.DeleteInfo(id))
                {
                    MessageBox.Show("Student deleted");
                    //clear fields
                    textBoxID.Text        = "";
                    textCourseName.Text   = "";
                    textCourseCode.Text   = "";
                    textCourseCredit.Text = "";
                }
                else
                {
                    MessageBox.Show("Student is not deleted");
                }
            }
        }
        private void buttonEdit_Click(object sender, EventArgs e)
        {
            UpdateDeleteCoursePresenter updateCoursePresenter = new UpdateDeleteCoursePresenter(this);

            if (updateCoursePresenter.updateCourse(Convert.ToInt32(textBoxID.Text), textCourseName.Text, textCourseCode.Text, textCourseCredit.Text))
            {
                MessageBox.Show("Course info Updated!");
            }
            else
            {
                MessageBox.Show("Course info not updated!");
            }
        }