What is OpenSilver?
OpenSilver is a modern, open-source framework that enables developers to build rich .NET web applications using C# and XAML, leveraging the power of WebAssembly. It provides unparalleled compatibility with Microsoft WPF and Silverlight, allowing you to migrate legacy desktop applications to the web with minimal effort. With the latest 3.3 release, OpenSilver introduces groundbreaking features: Blazor Components now run directly inside XAML applications, enabling seamless integration of modern web components. Additionally, MAUI Hybrid integration allows you to combine native mobile capabilities with your XAML UI. The AI-enhanced drag-and-drop UI designer accelerates development, making it easier than ever to create sophisticated interfaces.
Key benefits include cross-platform support across Windows, Android, Mac, and all major browsers (Chrome, Firefox, Safari, Edge) – truly build once, run everywhere. You can code in C#, VB, or F#, and leverage enterprise-grade controls and libraries, including RIA Services and LightSwitch. OpenSilver saves up to 3-6X in time and costs compared to rewriting applications from scratch. It is ideal for migrating legacy WPF or Silverlight apps to the modern web, preserving the original look and feel while gaining the advantages of web deployment. Use cases include modernizing enterprise line-of-business applications, extending the lifespan of legacy software, and building new cross-platform web apps with familiar .NET tooling.
Technical details: OpenSilver compiles C#/XAML to WebAssembly, running directly in the browser without plugins. It is fully open-source under the MIT License. The framework supports .NET Standard 2.0, enabling reuse of existing libraries. You can get started quickly via the SDK or the online IDE at XAML.io (no installation required). For migration projects, simply upload your XAP file for a quick quote. OpenSilver is backed by a team with over a decade of migration experience, offering support and consulting services. Whether you are starting fresh or modernizing legacy code, OpenSilver provides a powerful, cost-effective path to the modern web.
Use Cases
Key Features
WebAssembly based .NET apps C# and XAML support WPF/Silverlight migration Blazor component integration MAUI Hybrid integration AI enhanced drag and drop designer cross platform support enterprise grade controls RIA Services compatibility LightSwitch supportWho is it for?
WPF developers, Silverlight developers, .NET developers, enterprise IT teams, web application developers, legacy migration specialists, software architects
