GroupDocs.Comparison for .NET is a flexible and feature rich library which allows you to compare documents for all popular document formats, such as PDF comparison, DOCX comparison, XLSX comparison and many more.

Compare documents, retrieve list of changes between source and target document(s), apply or reject changes and save results with GroupDocs.Comparison for .NET API.

Features:
* Document comparison - detect differences between source and target document(s) for 50+ supported file formats;
* Categorize differences between document parts:
- Deleted – highlighted with red color;
- Added – highlighted with blue color;
- Modified – highlighted with green color;
* Style changes detection for the formats which support styles such as Words Processing, Presentation, PDF;
* Words detection for Word Processing formats;
* Formatting change detection, such as adding or removing paragraphs, line breaks in Word Processing format and PDF.
* Apply or reject changes and save resultant document;
* Obtain image representations of document pages with/without changes.

Supported document formats:
* Portable Document Formats - PDF (PDF/A-1a, PDF/A-1b, PDF/A-2a);
* Microsoft Word documents - DOC, DOCX, DOCM, DOT, DOTM, DOTX, RTF, TXT;
* Microsoft Excel spreadsheets - XLS, XLSX, XLT, XLTM, XLSB, XLSM, CSV;
* Microsoft PowerPoint presentations - PPT, PPTX, POT, POTX, PPS, PPSX;
* Microsoft Visio diagrams - VSD, VSDX, VSS, VST, VDX;
* Microsoft OneNote - ONE;
* Open Document formats - ODT, OTT, ODS, ODP, OTP;
* Ebook - MOBI;
* Image - PNG, JPG, BMP, DJVU, DICOM, DCM;
* Email - EML, EMLX, MSG;
* Autocad - DWG, DXF;
* Markup - HTML, HTM, MHTML.

Only for V.I.P