Class Libraries & REST APIs for the developers to manipulate & process Files from Word, Excel, PowerPoint, Visio, PDF, CAD & several other categories in Web, Desktop or Mobile apps. Develop & deploy on Windows, Linux, MacOS & Android platforms....Options HtmlSaveOptions save = new HtmlSaveOptions ( SaveFormat...template XLSX file Workbook book = new Workbook ( dataDir + "book1.xls"...