Document Automation APIs to enrich .NET and Java applications to view, edit, annotate, convert, compare, e-sign, parse, split, merge, redact, or classify documents of almost all the popular file formats....Blackout Text in PDF 4 C# 1 c# electronic signature 1 C# 中的文件自动化 1...Search by Regex 3 Search Electronic Signature in CSharp 1 search...