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....StrongCryptographicP , 128 ); //Password protect the file. workbook . Settings...Settings . Password = "1234" ; //Save the excel file. workbook...