.NET merge / diff library that allows developers to compare two versions of a PDF, Word (DOC/DOCX), Excel (XLS/XLSX), PowerPoint (PPT/PPTX), ODT, TXT or HTML document. Designed specifically to be easy to integrate into any .NET (ASP.NET / C# / VB.NET) app, the library also comes with a customizable diff view web UI. The UI allows you to display differences between compared documents with a redline change tracking view.