// For complete examples and data files, please go to https://github.com/groupdocs-watermark/GroupDocs.Watermark-for-.NET
using (var doc = Document.Load(Utilities.MapSourceFilePath(DocFilePath)))
{
// Search for hyperlinks only.
doc.SearchableObjects.PdfSearchableObjects = PdfSearchableObjects.Hyperlinks;
var watermarks = doc.FindWatermarks();
// The code for working with found watermarks goes here.
}