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....comment" ); //Save the file. excelApp . ActiveWorkbook . Save (); //Quit...comment" ; //Save As the excel file. workbook . Save ( "Book1.xls"...