'使用 C# 添加或删除注释或标记 PDF 文件'
No more long discussions within long email threads on the content of the document(s). You can use annotations to markup documents with personalized messages and their replies. This article discussed how to programmatically annotate PDF files to markup documents using C#. Additionally, we will also discuss how to remove annotations from PDF files. 本文讨论了以下主题：
- .NET API 注释 PDF 文件 * 为 PDF 添加注释 * 箭头注释 * 矩形注释 * 椭圆或椭圆注释 * 距离注释 * 从 PDF 文件中删除注释