Message in Chinese (Simplified) (中文(简体))

已尝试 Attach 或 Add 实体，该实体不是新实体，可能是从其他 DataContext 中加载来的。不支持这种操作。

Unlocalized message

An attempt has been made to Attach or Add an entity that is not new, perhaps having been loaded from another DataContext. This is not supported.

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