entityframework如何保存更改有效？

Question

我正在尝试将2个实体保存到两个不同的表中，这些表与一对一相关。但是对我来说有一些奇怪的东西。请看下面的代码

     public int CreateNotification(BusinessModel.Notification notification)
{
    var db = new DataAccess.ApplicationDbContext();
    var dbNotification = new DataAccess.Notification()
    {
        Name = notification.Name,
    };

    db.Notifications.Add(dbNotification);

    //set NotificationSchedule
    var dbNotificationSchedule = new  DataAccess.NotificationSchedule()
    {
        Schedule = JsonConvert.SerializeObject(notification.NotificationSchedule)
    };
    db.NotificatoinSchedule.Add(dbNotificationSchedule);

    ***db.SaveChanges();***

此代码有效且通知的外键设置为通知计划权限。 但问题是如何 通知的ID设置为notificatioschedule的ID？如果我在savechange之后添加相关实体则会出现错误，＆＃34;更新实体错误....＆＃34;

var db = new DataAccess.ApplicationDbContext();
var dbNotification = new DataAccess.Notification()
{
    Name = notification.Name,
};

db.Notifications.Add(dbNotification);

***db.SaveChanges();***

//set NotificationSchedule
var dbNotificationSchedule = new  DataAccess.NotificationSchedule()
{
    Schedule = JsonConvert.SerializeObject(notification.NotificationSchedule)
};
db.NotificatoinSchedule.Add(dbNotificationSchedule);

}

public class Notification
{
    public int Id { get; set; }
    public string Name { get; set; }
    public virtual NotificationSchedule NotificationSchedules { get; set; }

}



   public class NotificationSchedule
    {
        [ForeignKey("Notification")]
        public int Id { get; set; }
        public string Schedule { get; set; }
        public virtual Notification Notification { get; set; }
    }