Message in Chinese (Traditional) (中文(繁體))![](/img/flags/zh-Hant.png)
非同步 'Begin' 方法傳回 null 值,或該值傳遞至 AsyncCallback。非同步 'Begin' 實作必須傳回非 null 的 IAsyncResult,並將相同的 IAsyncResult 物件當做參數傳遞至 AsyncCallback。
Unlocalized message![](/img/flags/en.png)
A null value was returned from an async 'Begin' method or passed to an AsyncCallback. Async 'Begin' implementations must return a non-null IAsyncResult and pass the same IAsyncResult object as the parameter to the AsyncCallback.
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