Aspose.PDF for .NET 26.3

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

    // Open PDF document
    using (var document = new Aspose.Pdf.Document(dataDir + "input.pdf"))
    {
        // Configure optimization options
        var optimizeOptions = new Aspose.Pdf.Optimization.OptimizationOptions
        {
            SubsetFonts = true,
            AllowReusePageContent = true,
            CompressObjects = true,
            LinkDuplicateStreams = true,
            RemoveUnusedObjects = true,
            RemoveUnusedStreams = true,
            // Compress content streams and eligible image streams
            CompressAllContentStreams = true,
        };

        // Optimize PDF document
        document.OptimizeResources(optimizeOptions);

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

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

    // Open PDF document
    using (var pdf = new Aspose.Pdf.Document(dataDir + "input.pdf"))
    {
        // Configure optimization options
        var optimizeOptions = new Aspose.Pdf.Optimization.OptimizationOptions
        {
            AllowReusePageContent = false,
            CompressObjects = true,
            LinkDuplicateStreams = false,
            RemoveUnusedObjects = true,
            RemoveUnusedStreams = true,
            ImageCompressionOptions =
            {
                CompressImages = true,
                ResizeImages = true,
                MaxResolution = 150,
                ImageQuality = 90,
                Encoding = Aspose.Pdf.Optimization.ImageEncoding.Flate,
                Version = Aspose.Pdf.Optimization.ImageCompressionVersion.Mixed
            }
        };

        // Optimize PDF document resources
        pdf.OptimizeResources(optimizeOptions);

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

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

    // Open PDF document
    using (var pdfDoc = new Aspose.Pdf.Document(dataDir + "pdf_with_comments.pdf"))
    {
        // Save the first page to PNG with comments rendered
        var device = new Aspose.Pdf.Devices.PngDevice();
        device.Process(pdfDoc.Pages[1], dataDir + "comments_out.png");

        // Save the first page to HTML with comments rendered
        var options = new Aspose.Pdf.HtmlSaveOptions
        {
            ExplicitListOfSavedPages = new[] { 1 },
            UseZOrder = true
        };

        pdfDoc.Save(dataDir + "comments_out.html", options);
    }
}

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

    // Open PDF document
    var pdfDocument = new Aspose.Pdf.Document(dataDir + "input.pdf");

    // Create Resolution object
    var resolution = new Aspose.Pdf.Devices.Resolution(300);

    // Create TiffSettings object
    var tiffSettings = new Aspose.Pdf.Devices.TiffSettings
    {
        Compression = Aspose.Pdf.Devices.CompressionType.CCITT4,
        Shape = Aspose.Pdf.Devices.ShapeType.None,
        SkipBlankPages = false,
        Depth = Aspose.Pdf.Devices.ColorDepth.Format1bpp
    };

    // Create TIFF device
    var tiffDevice = new Aspose.Pdf.Devices.TiffDevice(resolution, tiffSettings);

    for (int i = 1; i <= pdfDocument.Pages.Count; i++)
    {
        string targetFilename = dataDir + "Asposeout-" + i + ".tif";
        tiffDevice.Process(pdfDocument, i, i, targetFilename);
    }
}