// GET: api/TeachersData
        public IHttpActionResult GetTeachers()
        {
            var list         = db.Teachers.ToList();
            var wrapperClass = new TeacherApi {
                Teachers = list
            };

            return(Ok(wrapperClass));
        }
        public async Task <IHttpActionResult> GetTeachers(int id)
        {
            var list = new List <Teacher>
            {
                await db.Teachers.FindAsync(id)
            };

            if (list == null)
            {
                return(NotFound());
            }
            var wrapperClass = new TeacherApi {
                Teachers = list
            };

            return(Ok(wrapperClass));
        }