OpenSilver is a modern, plugin-free, open-source reimplementation of Silverlight. It uses Mono for WebAssembly and Microsoft Blazor to bring back the power of C#, XAML, and .NET to client-side Web development.

Reuse your codebase. Improve your app. Run in every browser.

v1.0.24 - Requires Visual Studio 2019 (16.11+) or 2022 for Windows

Silverlight has reached end of support

Still have a legacy Silverlight application ?

OpenSilver offers two options to migrate:

Do It Yourself

Want to migrate from Silverlight to OpenSilver on your own?

Get up to speed with a Silverlight Migration Support Plan!

It includes everything you need to quickly get up and running.

Check it out

All Inclusive

Want us to do the migration for you, in a fast and cost-effective way, without compromising look or functionality?

Our experts have been migrating apps for over 5 years, with 100% success rate.

Contact us

Quickly get a quote by uploading your .XAP

Read the FAQ

"I was impressed with the level of commitment, technical ability and support from Userware from the very beginning."

Read some Success Stories