Aspose.PDF for .NET 26.4

// For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET
private static void ConvertPdfToJpeg()
{
    // The path to the documents directory
    var dataDir = RunExamples.GetDataDir_AsposePdf_DocumentConversion();

    // Open PDF document
    using (var pdfDocument = new Aspose.Pdf.Document(dataDir + "input.pdf"))
    {
        for (int pageCount = 1; pageCount <= pdfDocument.Pages.Count; pageCount++)
        {
            using (var imageStream = new System.IO.FileStream(
                dataDir + string.Format("page{0}.jpg", pageCount),
                System.IO.FileMode.Create))
            {
                // Create Resolution object
                var resolution = new Aspose.Pdf.Devices.Resolution(300);

                // Create JPEG device with specified resolution
                var jpegDevice = new Aspose.Pdf.Devices.JpegDevice(resolution);

                // Convert a particular page and save the image to stream
                jpegDevice.Process(pdfDocument.Pages[pageCount], imageStream);
            }
        }
    }
}

// For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET
private static void ConvertToPdfUa()
{
    // The path to the documents directory
    var dataDir = RunExamples.GetDataDir_AsposePdf_DocumentConversion();

    // Open PDF document
    using (var document = new Aspose.Pdf.Document(dataDir + "input.pdf"))
    {
        // Convert to PDF/UA format
        document.Convert(dataDir + "log.xml", Aspose.Pdf.PdfFormat.PDF_UA_1, Aspose.Pdf.ConvertErrorAction.Delete);

        // Save converted document
        document.Save(dataDir + "output.pdf");
    }
}