private void WriteMongo(AdvicesSubject business)
        {
            //save or update use tel as primary
            var sub = _collection.Linq().FirstOrDefault(x => x.tel == business.tel);

            if (sub != null)
            {
                sub.name    = business.name;
                sub.tel     = business.tel;
                sub.address = business.address;
                sub.city    = business.city;
                _collection.Save(sub);
            }
            else
            {
                _collection.Save(business);
            }
        }
 private void WriteMongo(AdvicesSubject business)
 {
     //save or update use tel as primary
     var sub = _collection.Linq().FirstOrDefault(x => x.tel == business.tel);
     if(sub!=null)
     {
         sub.name =business.name;
         sub.tel = business.tel;
         sub.address = business.address;
         sub.city = business.city;
         _collection.Save(sub);
     }
     else
         _collection.Save(business);
 }