OpenSilver: Modern .NET Web Apps with C# and XAML

OpenSilver

4 | 483 | 0
Type:
Open Source Projects
Last Updated:
2025/12/05
Description:
OpenSilver is an open-source framework enabling modern .NET web app development with C# and XAML. It facilitates easy migration from Silverlight and WPF, ensuring code reusability and cross-browser compatibility.
Share:
Silverlight migration
WPF
.NET web apps
XAML
open-source UI framework

Overview of OpenSilver

OpenSilver: Revolutionizing .NET Web App Development

What is OpenSilver? OpenSilver is an innovative, open-source UI framework designed to empower developers to build modern .NET web applications using C# and XAML. This framework is particularly beneficial for those looking to migrate from legacy technologies like Silverlight and WPF to a more contemporary web environment. Professionally supported by Userware, OpenSilver ensures a seamless transition with high code reusability and broad compatibility.

Key Features of OpenSilver

  • MAUI Hybrid Integration: The latest OpenSilver 3.2 release offers MAUI Hybrid integration, allowing WPF apps to run on iOS, Android, and more.
  • AI-Enhanced UI Designer: Features an AI-enhanced drag-and-drop UI designer, streamlining the development process.
  • Silverlight and WPF Compatibility: Provides unmatched compatibility with Microsoft Silverlight and extensive WPF support, ensuring legacy applications can be easily migrated.
  • Cross-Platform Support: Runs on any browser and any device, eliminating the limitations of Internet Explorer and Silverlight.
  • Code Reusability: Allows developers to leverage existing Silverlight or WPF code, extending the life of older projects.
  • Blazor, React, and Angular Compatibility: Can be mixed and matched with other tech stacks, offering flexibility in technology choices.
  • Dedicated Support: Offers dedicated support from a team of experts to assist with the migration process.
  • Identical UI Parity: Ensures a seamless transition to a modern framework without the need to retrain users or redo user documentation.

How Does OpenSilver Work?

OpenSilver operates by transpiling XAML and C# code into HTML5, JavaScript, and WebAssembly. This allows applications to run in modern web browsers without requiring plugins like Silverlight. The framework is built on top of .NET for WebAssembly and the open-source WPF codebase, ensuring high performance and compatibility.

Why Choose OpenSilver?

  • Cost Savings: Transitioning to OpenSilver can save up to 3-6X on time and costs compared to rewriting applications from scratch.
  • Future-Proofing: Ensures that legacy applications can run on modern browsers and devices, avoiding the limitations of older technologies.
  • Flexibility: Offers the ability to mix and match with other tech stacks like Blazor, React, and Angular.
  • Ease of Migration: Provides tools and support to simplify the migration process, ensuring a smooth transition.

Who is OpenSilver For?

OpenSilver is ideal for:

  • Organizations with existing Silverlight or WPF applications looking to migrate to a modern web environment.
  • Developers who want to leverage their existing C# and XAML skills to build web applications.
  • Businesses seeking a cost-effective solution to modernize their legacy applications.

Use Cases

  • Migrating Legacy Applications: OpenSilver is perfect for migrating Silverlight and WPF applications to modern web browsers.
  • Building Cross-Platform Web Applications: Develop applications that run on any device and browser, ensuring broad accessibility.
  • Extending the Life of Older Projects: Reuse existing code and extend the life of older projects, saving time and resources.

Getting Started with OpenSilver

To get started with OpenSilver:

  1. Download the SDK.
  2. Explore the documentation and showcase apps.
  3. Consider professional services subscriptions for additional support.
  4. Contact Userware for custom support plans or migration services.

Real-World Success: Repton Projects

Repton Projects migrated their legacy Silverlight application, which utilized Telerik controls and RIA services, to OpenSilver. The migrated version retained its appearance, performed faster, and preserved over 99% of the original code. This resulted in at least a threefold cost and time savings.

Conclusion

OpenSilver offers a robust and cost-effective solution for modernizing .NET web applications. By providing compatibility with legacy technologies, cross-platform support, and a range of features, OpenSilver empowers developers to build and maintain applications that meet the demands of today's web environment. Whether you're migrating from Silverlight or WPF, or starting a new project, OpenSilver is a powerful tool to consider.

What are the key features of OpenSilver? Its key features include MAUI Hybrid integration, an AI-enhanced UI designer, unmatched compatibility with Microsoft Silverlight, and extensive WPF support. These features ensure a seamless transition from legacy technologies to a modern web environment.

Best Alternative Tools to "OpenSilver"

Tags Related to OpenSilver