| Silverlight feature | Modern replacement | |---------------------|--------------------| | XAML UI | HTML5 + CSS + JavaScript or Blazor (WebAssembly) | | C# code-behind | TypeScript, React, Vue, or Blazor | | Media / DRM | HTML5 <video> + EME (Widevine, PlayReady) | | Data binding / MVVM | Angular, Vue, or plain JS with Proxy | | Web services (WCF) | REST + JSON (ASP.NET Core Web API) | | Isolated storage | IndexedDB or localStorage | | Out‑of‑browser apps | Progressive Web App (PWA) |