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.... Activate (); //Save As the excel file. excelApp...ActiveSheetIndex = 0 ; //Save As the excel file. workbook . Save ( "out_My_Book1...