private void btnAdd_Click(object sender, EventArgs e)
        {
            StudentForm form = new StudentForm();

            form.Open(null);

            form.createStudent = new StudentForm.CreateStudent(CreateStudent);
            form.updateStudent = new StudentForm.UpdateStudent(UpdateStudent);
        }
        private void btnUpdate_Click(object sender, EventArgs e)
        {
            StudentForm form = new StudentForm();

            form.Open(getSelectedStudentViewModelFromGrid());

            form.createStudent = new StudentForm.CreateStudent(CreateStudent);
            form.updateStudent = new StudentForm.UpdateStudent(UpdateStudent);
        }
        private void dvgSinhVien_MouseDoubleClick(object sender, MouseEventArgs e)
        {
            StudentForm form = new StudentForm();

            form.Open(getSelectedStudentViewModelFromGrid());

            form.createStudent = new StudentForm.CreateStudent(CreateStudent);
            form.updateStudent = new StudentForm.UpdateStudent(UpdateStudent);
        }