Microsoft Silverlight is a powerful development platform and application framework for creating cross-platform, media-rich web and mobile applications. It enables developers to easily create engaging, interactive user interfaces for browser-based applications using a combination of HTML, JavaScript, and XAML (Extensible Application Markup Language). Silverlight also includes a set of controls, data-binding, and other features that enable developers to create high-performance applications with a rich user experience. It allows developers to create applications for Windows, Mac, and Linux platforms, as well as for mobile devices. Silverlight applications run in the browser, so they can be deployed over the Internet without requiring any client-side installation. Additionally, Silverlight supports a variety of programming languages, including C#, VB.NET, and JavaScript.
Discontinued Only security patches are being made. Going to be discontinued completely in 2020.SRC: https://www.wired.com/story/adobe-finally-kills-flash-dead/