摘要： 1.当你完成对对象的操作之后，实体框架应用 change tracker 去保持对你所做的跟踪。As you perform operations on your object instances, Entity Framework uses its changetracker to keep track of what you have done.2.增加eg:private static void AddMachuPicchu(){using (var context = new BreakAwayContext()){var machuPicchu = new Destination{N 阅读全文

摘要： 1.查询privatestaticvoidFindGreatBarrierReef(){using(varcontext=newBreakAwayContext()){varquery=fromdincontext.Destinationswhered.Name=="GreatBarrierReef"selectd;varreef=query.SingleOrDefault();if(reef==null){Console.WriteLine("Can'tfindthereef!");}else{Console.WriteLine(reef.De 阅读全文