PdfDocument doc = new PdfDocument();
doc.LoadFromFile(PdfFile);
doc.SaveToFile(OfdFile, FileFormat.OFD

PdfDocument doc = new PdfDocument();
doc.LoadFromFile(inputPath);
PdfCertificate cert = new PdfCertificate(pfxPath, password);
PdfOrdinarySignatureMaker signatureMaker = new PdfOrdinarySignatureMaker(doc, cert);
signatureMaker.SetAcro6Layers(false);
signatureMaker.MakeSignature("signName", doc.Pages[0], 100, 100, 120, 60);
doc.SaveToFile(outputPath);

PdfDocument doc = new PdfDocument();
doc.LoadFromFile(inputPath);
PdfCertificate cert = new PdfCertificate(pfxPath, password);
PdfOrdinarySignatureMaker signatureMaker = new PdfOrdinarySignatureMaker(doc, cert);
PdfSignature signature = signatureMaker.Signature;
signature.Name = "E-iceblue";
signature.ContactInfo = "028-81705109";
signature.Location = "Chengdu";
signature.Reason = "The certificate of this document";
PdfSignatureAppearance appearance = new PdfSignatureAppearance(signature);
appearance.NameLabel = "Signer: ";
appearance.ContactInfoLabel = "ContactInfo: ";
appearance.LocationLabel = "Location: ";
appearance.ReasonLabel = "Reaseon: ";
appearance.SignatureImage = PdfImage.FromFile(imagePath);
appearance.GraphicMode = GraphicMode.SignImageAndSignDetail;
signatureMaker.MakeSignature("signName", doc.Pages[0], 100, 600, 200, 100, appearance);
doc.SaveToFile(outputPath);

PdfOrdinarySignatureMaker signatureMaker = new PdfOrdinarySignatureMaker(doc, x509);
signatureMaker.MakeSignature("signName");

Workbook workbook = new Workbook();
workbook.LoadFromFile("Sample.xlsx");
Worksheet sheet = workbook.Worksheets[0];
SaveShapeTypeOption shapelist = new SaveShapeTypeOption();
List images = sheet.SaveShapesToImage(shapelist);
int index = 0;
foreach (System.Drawing.Image img in images)
{
    img.Save("toImage" + index + ".Png", ImageFormat.Png);
    index++;
}

Workbook wb = new Workbook();
wb.LoadFromFile(etInputFile);
//wb.LoadFromFile(ettInputFile);
wb.SaveToFile(etOutputFile, FileFormat.ET);
//wb.SaveToFile(ettOutputFile, FileFormat.ETT);

ppt.SaveToFile(outputPath + filename + ".dps", FileFormat.Dps);
ppt.SaveToFile(outputPath + filename + ".dpt", FileFormat.Dpt);

IChart chart = ppt.Slides[0].Shapes[0] as IChart;
ITrendlines trendline = chart.Series[0].TrendLines[0] as ITrendlines;
foreach(TextParagraph para in trendline.TrendLineLabel.TextFrameProperties.Paragraphs)
{
    para.DefaultCharacterProperties.FontHeight = 20;
    foreach(TextRange range in para.TextRanges)
    {
        range.FontHeight = 20;
    }
}
trendline.TrendLineLabel.OffsetX = -0.1f;
trendline.TrendLineLabel.OffsetY = 0.1f;

IChart chart = ppt.Slides[0].Shapes[0] as IChart;
chart.Line.FillFormat.FillType = FillFormatType.Solid;
chart.Line.FillFormat.SolidFillColor.Color = Color.Red;
chart.BorderRoundedCorners = false;

Regex regex = new Regex("^[A-Za-z]+$");
string newvalue = "new string";
foreach(IShape shape in ppt.Slides[0].Shapes)
{
    shape.ReplaceTextWithRegex(regex, newvalue);
}

Presentation ppt = new Presentation();
ppt.LoadFromFile(intputFile);
IChart chart = ppt.Slides[0].Shapes[0] as IChart;
IChartAxis chartAxis = chart.PrimaryCategoryAxis;
chartAxis.TickMarkSpacing = 30; 
ppt.SaveToFile(outputFile, FileFormat.Pptx2013); 

FileStream from_stream = File.OpenRead(inputFile);
Presentation presentation = new Presentation();
presentation.LoadFromStream(from_stream,FileFormat.Auto, "12345");           
presentation.SaveToFile(outputFile_px, FileFormat.Pptx2013);

BarcodeInfo[] barcodeInfos = BarcodeScanner.ScanInfo(imageFile);
//BarcodeInfo[] barcodeInfos = BarcodeScanner.ScanInfo(imageFile, barCodeType);
for (int i = 0; i < barcodeInfos.Length; i++)
{
//Get the barcode type
BarCodeReadType barCodeReadType = barcodeInfos[i].BarCodeReadType;
//Get the four vertices of the rectangle
Point[] vertexes = barcodeInfos[i].Vertexes;
}