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.... C# Workbook workbook = new Workbook ( "../../data/test...xlsx" ); Worksheet sheet1 = workbook . Worksheets [ 0 ]; Cells...