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OpenSilver

WPF/Silverlight for the Modern Web

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OpenSilver

WPF/Silverlight for the Modern Web

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OpenSilver

WPF/Silverlight for the Modern Web

OpenSilver is a free, open-source UI framework for building modern .NET web applications in C# and XAML. It is professionally supported by Userware.

OpenSilver is a free, open-source UI framework for building modern .NET web applications in C# and XAML. It is professionally supported by Userware.

Download SDK
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Download SDK
Documentation
Gallery
Success Stories
What’s New and Roadmap
Source code on Github
EULA

Migration Service FAQ
SL Migration Support Plans
Pro Services Subscriptions
Upload Your .XAP
Press Room
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Contact

Migration Service FAQ
SL Migration Support Plans
Pro Services Subscriptions
Upload Your .XAP
Press Room
Jobs
Contact

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With thanks to the Microsoft teams behind .NET for WebAssembly and the open-source WPF codebase that help power OpenSilver.

© 2026 — Metro Spring. - Microsoft, Silverlight, Visual Studio, LightSwitch, .NET, and WPF are trademarks or registered trademarks of the Microsoft group of companies. OpenSilver is not affiliated with Microsoft. OpenSilver is a trademark of Userware. Other trademarks are the property of their respective owners.

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