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

非同步呼叫已經在進行中。必須在完成或取消該呼叫之後，才可以呼叫這個方法。
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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 (Traditional) Legacy

Error category
 .Net Framework

Other localized versions
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