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NEW – OpenSilver 3.1: First XAML Designer for VS Code!

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.

Download SDK
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Gallery
Success Stories
What’s New and Roadmap
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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
Jobs
Contact

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

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Credits go to the incredibly talented people in the Mono/.NET for WebAssembly and Microsoft Blazor teams for the amazing underlying technologies that power OpenSilver.

© 2025 Userware - All Rights Reserved. - 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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