Attachments in PDF document

PdfLoadOptions loadOptions = new PdfLoadOptions();
// Constants.InDocumentPdf is an absolute or relative path to your document. Ex: @"C:\Docs\document.pdf"
using (Watermarker watermarker = new Watermarker(Constants.InDocumentPdf, loadOptions))
{
    PdfContent pdfContent = watermarker.GetContent<PdfContent>();
    foreach (PdfAttachment attachment in pdfContent.Attachments)
    {
        Console.WriteLine("Name: {0}", attachment.Name);
        Console.WriteLine("Description: {0}", attachment.Description);
        Console.WriteLine("File type: {0}", attachment.GetDocumentInfo().FileType);

        // Save the attached file on disk
        File.WriteAllBytes(Path.Combine(Constants.OutputPath, attachment.Name), attachment.Content);
    }
}

PdfLoadOptions loadOptions = new PdfLoadOptions();
// Constants.InDocumentPdf is an absolute or relative path to your document. Ex: @"C:\Docs\document.pdf"
using (Watermarker watermarker = new Watermarker(Constants.InDocumentPdf, loadOptions))
{
    PdfContent pdfContent = watermarker.GetContent<PdfContent>();

    // Add the attachment
    pdfContent.Attachments.Add(File.ReadAllBytes(Constants.InSampleDocx), "sample doc", "sample doc as attachment");

    // Save changes
    watermarker.Save(Constants.OutDocumentPdf);
}

PdfLoadOptions loadOptions = new PdfLoadOptions();
// Constants.InDocumentPdf is an absolute or relative path to your document. Ex: @"C:\Docs\document.pdf"
using (Watermarker watermarker = new Watermarker(Constants.InDocumentPdf, loadOptions))
{
    PdfContent pdfContent = watermarker.GetContent<PdfContent>();
    for (int i = pdfContent.Attachments.Count - 1; i >= 0; i--)
    {
        PdfAttachment attachment = pdfContent.Attachments[i];

        // Remove all attached pdf files with a particular name
        if (attachment.Name.Contains("sample") && attachment.GetDocumentInfo().FileType == FileType.DOCX)
        {
            pdfContent.Attachments.RemoveAt(i);
        }
    }

    watermarker.Save(Constants.OutDocumentPdf);
}

PdfLoadOptions loadOptions = new PdfLoadOptions();
// Constants.InDocumentPdf is an absolute or relative path to your document. Ex: @"C:\Docs\document.pdf"
using (Watermarker watermarker = new Watermarker(Constants.InDocumentPdf, loadOptions))
{
    // Consider only the attached images
    watermarker.SearchableObjects.PdfSearchableObjects = PdfSearchableObjects.AttachedImages;

    // Search for similar images
    WatermarkableImageCollection possibleWatermarks = watermarker.GetImages();
    Console.WriteLine("Found {0} image(s).", possibleWatermarks.Count);
}