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....OpenOffice-Tabellendatei sein kann (also XLS, XLSX, XLSM, XLSB, ODS usw.) mit einer...C# string filePath = "source.xlsx" ; //Load your source workbook...