https://feedback.telerik.com/wpf/1690122-pdfviewer-expose-an-api-that-allows-you-add-remove-annotations-ipointerhandler
PdfViewer: Expose an API that allows you Add/Remove Annotations/IPointerHandler
an apiremove annotationsexpose
https://www.pdfup.org/remove-annotations
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https://blog.groupdocs.cloud/zh/tag/remove-annotations/
Remove Annotations
Document Automation APIs along with open-source SDKs to enhance Java, Python, Node.js, C# .NET, Ruby, C++, and PHP applications to view, edit, annotate,...
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