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....GetSheetInfo ( string fileName ) { // Open file as read-only. using ( SpreadsheetDocument...mySpreadsheet = SpreadsheetDocument . Open ( fileName , false )) { S sheets...