Message in Chinese (Traditional) (中文（繁體）)
無法變更物件狀態。這個例外狀況可能是一或多個主索引鍵屬性設定為 Null 所造成。未加入的物件不可具有 Null 主索引鍵值。如需詳細資訊，請參閱內部例外狀況。
Unlocalized message
The object state cannot be changed. This exception may result from one or more of the primary key properties being set to null. Non-Added objects cannot have null primary key values. See inner exception for details.
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