void extractor_ExtractionProgress(object sender, ExtractionEventArgs e)
 {
     OnExtractionProgress(e);
 }
 protected virtual void OnExtractionProgress(ExtractionEventArgs e)
 {
     if (ExtractionProgress != null)
         ExtractionProgress(this, e);
 }
 protected virtual void OnExtractionProgress(ExtractionEventArgs e)
 {
     var extractionProgress = ExtractionProgress;
     if (extractionProgress != null)
         extractionProgress(this, e);
 }