Message in Chinese (Simplified) (中文(简体))![](/img/flags/zh-chs.png)
由于该对象返回了一个为 null 的 EntityKey 属性值,因此无法完成请求的操作。
Unlocalized message![](/img/flags/en.png)
The requested operation could not be completed, because a null EntityKey property value was returned by the object.
Search by Google