private void StudentListForm_Activated(object sender, EventArgs e)
        {
            // TODO: This line of code loads data into the 'cOMP123DataSet.Students' table. You can move, or remove it, as needed
            this.studentsTableAdapter.Fill(this.cOMP123DataSet.Students);

            // it has already included  "this.studentsTableAdapter.Fill(this.cOMP123DataSet.Students)"
            StudentDataContext db = new StudentDataContext();
            List<Student> studentList = (from student in db.Students
                                   select student).ToList();
            StudentDataGridView.DataSource = studentList;
        }
        private void StudentListForm_Activated(object sender, EventArgs e)
        {
            // TODO: This line of code loads data into the 'cOMP123DataSet.Students' table. You can move, or remove it, as needed
            this.studentsTableAdapter.Fill(this.cOMP123DataSet.Students);

            // it has already included  "this.studentsTableAdapter.Fill(this.cOMP123DataSet.Students)"
            StudentDataContext db          = new StudentDataContext();
            List <Student>     studentList = (from student in db.Students
                                              select student).ToList();

            StudentDataGridView.DataSource = studentList;
        }