Workbook wb = new Workbook();
 wb.LoadFromFile(inputFile);
 Worksheet pivotSheet = wb.Worksheets[0]; 
 XlsPivotTable pivot = (XlsPivotTable)pivotSheet.PivotTables[0]; PivotField dateBaseField = pivot.PivotFields["number"] as PivotField;
 dateBaseField.CreateGroup(3000, 3800, 1);
 pivot.CalculateData();
 wb.SaveToFile(outputFile);
 wb.Dispose();

ppt.SaveToSvgOption.ConvertPictureUsingGraphicTag = true;

// Create a PdfDocument object
PdfDocument doc = new PdfDocument();           
// Load a PDF file
doc.LoadFromFile(inputFile);            
// Initialize a StringBuilder to store extracted text
StringWriter highlightedTextWriter = new StringWriter();           
// Loop through each page in the document
foreach (PdfPageBase page in doc.Pages)
{
	// Get all annotations on the page
	PdfAnnotationCollection annotations = page.Annotations;                
	// Loop through the annotations
	foreach (PdfAnnotation annotation in annotations)
	{
		// Check if the annotation is a highlight annotation
		if (annotation is PdfTextMarkupAnnotationWidget highlightAnnotation)
		{
			if (highlightAnnotation.TextMarkupAnnotationType == PdfTextMarkupAnnotationType.Highlight)
			{
				PdfBrush brush = PdfBrushes.Red;
				PdfPen pen = new PdfPen(brush, 1f);                          
				for (int i = 0;i<highlightAnnotation.QuadPoints.Length;i += 2) {
					page.Canvas.DrawLine(pen, highlightAnnotation.QuadPoints[i], highlightAnnotation.QuadPoints[i + 1]);
				}
				
			}
		}
	}
}            
doc.SaveToFile(outputFile);

PdfDocument pdf = new PdfDocument();
pdf.LoadFromFile(inputFile);
for (int i = 0; i < pdf.Pages.Count; i++)
{
	PdfPageBase page = pdf.Pages[i];
	PdfAnnotationCollection ancoll = page.Annotations;
	for (int j = 0; j < ancoll.Count; j++)
	{
		PdfRichMediaAnnotationWidget MediaWidget = ancoll[j] as PdfRichMediaAnnotationWidget;
		byte[] data = MediaWidget.RichMediaData;
		string embedFileName = MediaWidget.RichMediaName;
		File.WriteAllBytes(outputFile + embedFileName,data);
	}
}