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....“Hello World” phrases in the worksheet and replaces them with “Goodbye..."UTF-8" standalone = "yes" ?> < worksheet xmlns = "http://schemas.openxmlformats...