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....Add_Section () { using var pres = new Presentation (); // Specify the...pres . Sections . AddSection ( "New Section" , pres . Slides [ 0...