Released: Apr 1, 2026

Updates in 16.2.1

Features

• PDF4NET
  • Create PDFRawImage objects from COS image streams.
  • Added PDFDocumentFileAttachment.GetPayloadStream method for efficient access to large attachments.
• PDF4NET.View
  • WinForms - You can now select annotations outside page area.

Fixes

• PDF4NET
  • StructureTree cannot be loaded for some PDF files.
• PDF4NET.View
  • Loading a PDF file in incremental mode in PDFDocumentView throws an IO exception.
  • PDFDocumentView hangs on document load when running on .NET 10.
  • WinForms - PDFDocumentView.ContentPainted event allows user to draw over the loading indicator area.
  • WinForms The PDFDocumentView page number indicator is not displayed correctly on High-Dpi screens.
  • WPF - Annotation group selection does not work correctly when PDFDocumentView.RestrictAnnotationsToVisiblePageArea is false.