Message in Chinese (Traditional) (中文（繁體）)
實體型別 '<var>Type Name</var>' 上定義的名為 '<var>X</var>' 的關聯無效: 關聯的一端 (唯一一端) 必須設定 IsForeignKey 為 true。
Unlocalized message
Association named '<var>X</var>' defined on entity type '<var>Type Name</var>' is invalid: one and only one side of the association must have IsForeignKey set to true.
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