public ActionResult InstructorRegistration(Instructor ins) { //if mail exists error //getInstructorby Mail if (ins == null) { return(BadRequest()); } //GeInsBy mail if (_db.GetInstructorByMail(ins.Mail) != null || _db.GetStudentByMail(ins.Mail) != null) { return(BadRequest("Mail is Exists Try another one "));//400 } if (ModelState.IsValid) { return(Ok(_db.AddInstructor(ins))); } else { return(BadRequest("Values Are not ok")); } }