C# .NET document parsing API to extract text, images, metadata & encoding from databases, PDF, Word, Excel, presentations, web, email, EPUB & zip file formats....XLT, XLTX, XLTM, OTS, XLA,, XLAM, TSV Presentations : PPT, PPTX...XLSX, XLT, XLTX, XLTM, XLA, XLAM, OTS, ODS Presentations : PPT...