public async Task <IActionResult> PutStudent(long id, Student student) { if (id != student.Id) { return(BadRequest()); } _context.Entry(student).State = EntityState.Modified; try { await _context.SaveChangesAsync(); } catch (DbUpdateConcurrencyException) { if (!StudentExists(id)) { return(NotFound()); } else { throw; } } return(NoContent()); }