Message in Chinese (Simplified) (中文(简体))
要刷新的对象集合中位于索引 <var>X</var> 处的元素具有为 null 的 EntityKey 属性值,或未附加到此 ObjectStateManager。
Unlocalized message
The element at index <var>X</var> in the collection of objects to refresh has a null EntityKey property value or is not attached to this ObjectStateManager.
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