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

无法将具有 null EntityKey 值的对象附加到对象上下文。

Unlocalized message

An object with a null EntityKey value cannot be attached to an object context.

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Arabic (العربية) Chinese (Simplified) (中文(简体)) Chinese (Traditional) (中文（繁體）) Czech (Čeština) Danish (Dansk) Dutch (Nederlands) Finnish (suomi) French (Français) Prior (Message) German (Deutsch) Greek (Ελληνικά) Hebrew (עברית) Hungarian (magyar) Italian (Italiano) Japanese (日本語) Korean (한국어) Norwegian (Bokmal) (Norsk (Bokmål)) Polish (Polski) Next (Message) Russian (Русский) Spanish (Español) Swedish (Svenska) Turkish (Türkçe) Chinese (Traditional) (中文（繁體）) Portuguese (Brazil) (Português (Brasil))