简单场景

[ClientTable]: ClientId, ClientName, Phone, Age
[CityTable]: CityID, CityName, Country
[ClientCityTable]: ClientCityID, ClientID, CityID

Client client = new Client("John", 123456789, 40);
City city = new City("NY", USA);
ClientCity clientCity = new ClientCity(client, city);

我应该对每个对象（表）还是仅对clientCity进行InsertOnSubmit？还是没关系？有什么区别？

编辑

我在问我是否应该做

DatabaseDC dc = new DatabaseDC(connectionString);
dc.Client.InsertOnSubmit(client);
dc.City.InsertOnSubmit(city);
dc.ClientCity.InsertOnSubmit(clientCity);
dc.SubmitChanges();

或仅

DatabaseDC dc = new DatabaseDC(connectionString);
dc.ClientCity.InsertOnSubmit(clientCity);//because this object has references to client and city
dc.SubmitChanges();

？

编辑2

我做了几次尝试，甚至InsertOnSubmit只在上使用client，条目也插入到City和中ClientCity。我应该如何正确做？