YouareimplementinganASP.NETapplicationthatusesLINQtoEntitiestoaccessandupdatethedatabase.TheapplicationincludesthefollowingmethodtoupdateadetachedentityoftypePerson.YouneedtoimplementtheUpdatePersonmethodtoupdatethedatabaserowthatcorrespondstothepersonToE
题目
YouareimplementinganASP.NETapplicationthatusesLINQtoEntitiestoaccessandupdatethedatabase.TheapplicationincludesthefollowingmethodtoupdateadetachedentityoftypePerson.YouneedtoimplementtheUpdatePersonmethodtoupdatethedatabaserowthatcorrespondstothepersonToEditobject.Whichcodesegmentshouldyouuse？（）
A._entities.People.Attach（personToEdit）；_entities.ObjectStateManager.ChangeObjectState（personToEdit，EntityState.Modified）；_entities.SaveChanges（）；
B._entities.ObjectStateManager.ChangeObjectState（personToEdit，EntityState.Added）；_entities.SaveChanges（）；
C._entities.People.ApplyCurrentValues（personToEdit）；_entities.SaveChanges（）；
D._entities.People.Attach（newPerson（）{Id=personToEdit.Id}）；_entities.ObjectStateManager.ChangeObjectState（personToEdit，EntityState.Modified）；_entities.SaveChanges（）；