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PDFTron's PDF SDK is a high-quality, industry-strength .NET PDF library (with WPF/WinForms support) for the most demanding and diverse applications. Using PDFTron, build stand-alone, cross-platform, and reliable commercial applications that read, write, edit, print, and display PDF documents. PDFTron's C# .NET PDF library is trusted by thousands of innovative startups, governments, and Fortune 500 businesses (see customers ). PDFTron technology is built from the ground up and is not dependent on any external third-party open-source software.