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....creates a polygon with a hole inside: Polygon polygon = new Polygon();...00, 36.22); polygon.ExteriorRing = ring; polygon.AddInteriorRing(hole);...