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...."YOUR_MAILGUN_PRIVATE_API_KEY" ; var opt = new MailgunClientOptions { Domain..."YOUR_SENDGRID_PRIVATE_API_KEY" ; var opt = new SendGridClientOption { ApiKey...