public IActionResult AddCourseSection(int CrsId, CourseSection courseSection)
        {
            if (CrsId > 0)
            {
                IEnumerable <CourseSection> CrsSections = _db.AddCourseSection(CrsId, courseSection);
                if (CrsSections != null)
                {
                    return(Ok(CrsSections));
                }

                return(BadRequest("Error"));
            }
            return(BadRequest("Error"));
        }