public void PartialUpStud(int id, StudentPatch st)
        {
            var student = _Studentlist.Students.Find(id);

            student.Address       = st.Address;
            student.ContactNumber = st.ContactNumber;
            _Studentlist.SaveChanges();
        }
 public ActionResult PutPar(int id, StudentPatch st)
 {
     this._IStudentService.PartialUpStud(id, st);
     return(Ok());
 }