public IActionResult DeleteCourse([FromBody] StaffCourseAssignmentModel course)
 {
     if (StaffCourseAssignmentRepo.Delete(course))
     {
         return(Ok("Course has been successfully deleted."));
     }
     return(NotFound("The course was not found."));
 }
 public IActionResult AddCourse([FromBody] StaffCourseAssignmentModel courseAssignment)
 {
     if (StaffCourseAssignmentRepo.Add(courseAssignment))
     {
         return(Ok("Course successfully added."));
     }
     else
     {
         return(BadRequest("This course already exists."));
     }
 }
        public IActionResult Get(int id)
        {
            var students = StaffCourseAssignmentRepo.GetById(id);

            return(Ok(students));
        }
        public IActionResult Get()
        {
            var courseAssignment = StaffCourseAssignmentRepo.GetAll();

            return(Ok(courseAssignment));
        }