好的，这可能与EF无关。我正在尝试使用代码优先功能，以下是我写的内容:-varmodelBuilder=newModelBuilder();varmodel=modelBuilder.CreateModel();using(AddressBookcontext=newAddressBook(model)){varcontact=newContact{ContactID=10000,FirstName="Brian",LastName="Lara",ModifiedDate=DateTime.Now,AddDate=DateTime.Now,Title="Mr."};context.co