public HttpResponseMessage Delete(int ID) { var teacher = teaDB.ListAll().Find(t => t.Id.Equals(ID)); string message = "Teacher Deleted Successfully"; string messagenodata = "Data Not found/ Might be Deleted or Removed"; HttpResponseMessage response; if (teacher == null) { response = Request.CreateResponse(HttpStatusCode.BadRequest, messagenodata); } else { teaDB.Delete(ID); response = Request.CreateResponse(HttpStatusCode.OK, message); } return(response); }