English version of all error messages you can encounter while programming
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Localized version

异步调用已在进行中。必须先完成或者取消此调用，然后才能调用此方法。
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English version

An asynchronous call is already in progress. It must be completed or canceled before you can call this method.
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Localized version
 Chinese (Simplified) Legacy

Error category
 .Net Framework

Other localized versions
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