Tengo el siguiente código, ¿cuál es la forma de invocar la acción resaltada en una tarea asíncrona?

@if (ShowScanBarcodeCustom) { <BarcodeReader ScanResult="((e) => { BarCodeCustom=e; ShowScanBarcodeCustom = !ShowScanBarcodeCustom; })" Close="(()=>ShowScanBarcodeCustom=!ShowScanBarcodeCustom)" OnError="OnError" UseBuiltinDiv ="falso" @ref="barcodeReaderCustom" />

 <div @ref="barcodeReaderCustom.barcodeScannerElement"> <div style="width: 480px; max-width: 100%"> <button class="btn btn-outline-success p-2 m-1 w-25" **data-action="startButton">**Scan</button> <button class="btn btn-outline-success p-2 m-1 w-25" **data-action="resetButton">**Reset</button> <button type="button" class="btn btn-outline-success p-2 m-1 w-25" **data-action="closeButton">**Close</button> <div data-action="sourceSelectPanel" style="display:none"> <label for="sourceSelect">SelectDevice:</label><span class="text-dark" data-action="result"></span> <select data-action="sourceSelect" style="max-width:100%" class="form-control"> </select> </div> <div> <video id="video" style="height:480px;width: 640px;border: 1px solid red"></video> </div> </div> </div>

}