public OfficeClass Get(int Id)
 {
     using (WaecDirDbEntities db = new WaecDirDbEntities())
     {
         return(db.OfficeClasses.FirstOrDefault(o => o.Id == Id));
     }
 }
 public IEnumerable <OfficeClass> Get()
 {
     using (WaecDirDbEntities db = new WaecDirDbEntities())
     {
         return(db.OfficeClasses.ToList());
     }
 }