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....sent MailMessage msg = new MailMessage (); msg . From = "from@domain..."from@domain.com" ; msg . To = "to@domain.com" ; msg . Subject = "appointment...