Linq to Entities 一对多外键关联 添加数据报错？
ActilceT At = new ActilceT();
At.ActicleContent = "ss";
At.ActilceListT.ActilceListID = 1;//这行报错未将对象引用到实例；ActilceListID是ActilceT表的外键，ActilceListT是主表，
using (E_dbEntities db = new E_dbEntities())
{
db.AddToActilceT(At);
db.SaveChanges();
}

[解决办法]

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ActilceT At = new ActilceT();
At.ActicleContent = "ss";
At.ActilceListT.ActilceListID = 1;//这行报错未将对象引用到实例；ActilceListID是ActilceT表的外键，ActilceListT是主表，
using (E_dbEntities db = new E_dbEntities……

[解决办法]
At.ActilceListT=new 类型；
At.ActilceListT.ActilceListID = 1;