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[C# SerialPort] DataReceived イベント内でSerialPort.Close()をすると死ぬ

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Close()を実行すると自身の実行されているイベントの終了を待つので、イベントの中でClose()するとデットロックが生じます。

デバッグ的にはClose()内にはいったままTry catchにも引っかからずだんまりとなります。

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