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

在构建事件路由或调用处理程序之前，必须在 RoutedEventArgs 中设置 Source。

Unlocalized message

Must set Source in RoutedEventArgs before building event route or invoking handlers.

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