public bool RemoveStudent(string indexNumber)
        {
            ModelsFramework.Student st = _context.Student.Where(x => x.IndexNumber == indexNumber).First();

            _context.Student.Remove(st);
            return(true);
        }
        public bool UpdateStudent(ModelsFramework.Student student)
        {
            /* way for checking if update was executed correctly */
            _context.Update(student);
            _context.SaveChanges();

            /*ModelsFramework.Student s = (from x in ModelsFramework.Student where x.IndexNumber == student.IndexNumber).First();
             * s.IndexNumber = student.IndexNumber;
             * s.FirstName = student.FirstName;
             * s.LastName = student.LastName;*/

            return(true);
        }