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....code ; } } //Save the output Excel file workbook . Save ( "output...RemoveAt ( 0 ); //Save the workbook workbook . Save ( "output.xlsx"...