This library helps implement document comparison applications.
GroupDocs.Comparison for .NET is a library which allows you to merge and compare two versions of a document. These could be Microsoft Word or PDF documents. The difference in the two versions are displayed in a diff view interface. This library set is capable of handling many other document formats such as Excel spreadsheets (XLS, XSLSX), PowerPoint presentations (PPT, PPTX), TXT and HTML documents. The also library offers a web diff UI that displays differences between compared documents. It offers a redline change tracking view. The library has a flexible API. That helps you customize this UI easily. It is possible to build one from ground up. You may even decide to drop it altogether. The differences that are displayed can be accepted or rejected by the end user. The modified document then can be saved as a DOC or a DOCX one.
The applications you develop could also offer comparing and merging of up to three versions of Word files. All the functionalities are available through a single DLL, there are no external dependencies. You would not need to download any other third party stuff for the clients or the server implementation. A C# demo let you understand implementation issues clearly. Tech support is available throughout the trial period. If your development environment is within .NET (ASP.NET, C#, VB.NET), this library would let you develop effective merge and difference applications easily. Open Office document formats are also supported by this library. This is a good tool.