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.... Rows . Add ( dr ); dr = dt . NewRow..."LastName" ] = "Doe" ; dt . Rows . Add ( dr ); dr = dt . NewRow...