C# .NET Document Comparison API. Compare & merge PDF Word DOC DOCX, Excel Spreadsheet, PPT, PPTX, HTML, EMLX MSG, VSDX, DXF DWG & image file formats....spreadsheets, PowerPoint presentations, OneNote, Visio diagrams..., MOBI AutoCAD : DXF , DWG Email : EML , EMLX , MSG Images :...