OpenSilver/OpenSilver

Health v2 · maintenance only

Flags: no_releases no_license

Adoption not part of the score

1260 stars · 132 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

OpenSilver is an open-source, MIT-licensed framework for building cross-platform applications with C#, VB.NET, or F# and XAML, powered by WebAssembly and .NET. It implements a large subset of the WPF API so a single codebase can target web, Android, iOS, Windows, macOS, and Linux, and it is designed to ease migration from legacy WPF, Silverlight, and LightSwitch apps.

Use cases

• migrate a legacy Silverlight app to modern browsers without plugins
• port a WPF desktop application to the web
• build a cross-platform app in C# and XAML with one codebase
• run XAML UI in the browser via WebAssembly
• modernize a LightSwitch or Windows Forms application
• reuse existing WPF MVVM code on mobile and web

When to choose

• you have existing WPF, Silverlight, or LightSwitch code and want to preserve it
• your team knows XAML and .NET and wants to avoid learning JavaScript frameworks
• you need one codebase targeting web, desktop, and mobile
• you want DOM-based rendering for accessibility, SEO, and text selection

When to avoid

• you are starting a greenfield web app and prefer mainstream JS/TS ecosystems
• you need pixel-perfect custom rendering rather than HTML DOM output
• you rely on WPF APIs outside the subset OpenSilver implements
• you need a fully community-driven project without commercial backing

Facets

framework · maturity active

frontend-framework ui-components wasm templating state-management web-development frontend cross-platform mobile-development desktop-applications developer-tools browser wasm cross-platform windows dotnet xaml wpf silverlight maui-hybrid blazor mvvm dotnet csharp vbnet fsharp migration photino web-server macos linux android ios

Member repositories

For agents

markdown · JSON · MCP: product_card(name="OpenSilver/OpenSilver")