CSHTML5 has now become OpenSilver!

We are happy to announce that CSHTML5 has been significantly improved and rebranded to 'OpenSilver', which stands for 'Open-source reimplementation of Silverlight'. It is fully backward compatible and it can be downloaded from Upgrading from CSHTML5 to OpenSilver is very easy.
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The Beta 2 of C#/XAML for HTML5 adds support for Data Binding, Styles, StaticResource, XAML preview, DispatcherTimer, and much more!

Nov. 26, 2014 — The beta 2 version of C#/XAML for HTML5 - the free Visual Studio extensions that enables developers to create HTML5 apps using only C# and XAML - was released today, with new features including Data Binding, Styles, StaticResource, XAML design-time preview, DispatcherTimer, and more.

The new beta can be downloaded for free from

(limited to the first 5000 downloads - users who tested the first beta have received an email with the download link)

The new features include:

  • Data Binding
  • Styles
  • DataContext, DataTemplate, ItemsControl, ContentControl
  • StaticResource markup extension
  • DispatcherTimer
  • XAML design-time preview
  • 2x Faster Compilation, 2x Faster Load Time
  • Smaller Generated Files
  • Unsupported methods are now reported at compile-time rather than run-time
  • And more...

Other related news:

  • The sample showcase app was updated to demonstrate the new features.
  • A new page on UserVoice was created to let users vote for their most wanted features.

About C#/XAML for HTML5:

C#/XAML for HTML5 is a free extension for Visual Studio that enables developers to create cross-platform HTML5 applications exclusively using C# and XAML.

It is designed for the developers who use Microsoft languages and tools (C#, XAML, Visual Studio) and who would like to extend the reach of their applications to platforms other than Microsoft's (Windows, Windows Phone, Xbox), such as Android, iOS, Mac, Chromebook, BlackBerry, and Linux.

Moreover, it is also of interest to developers who wish to create client-side rich web applications ("single-page applications") using C#/XAML without having to manipulate HTML, CSS, and JavaScript.

More information and download can be found at:

About Userware:

Userware is a software company founded in 2007 by two experts in Microsoft technologies. It has gained popularity in the last years for consumer apps such as XLS Editor (#1 Paid Productivity App in the Windows Store for 6 consecutive months), and, a patent-pending online operating system made in Silverlight that can be enhanced Wiki-style by users using an online development environment. With "C#/XAML for HTML5", Userware aims to enable all C#/XAML developers to build cross-platform HTML5 apps with the skills, tools, and code base they already have.

Userware is online at:


You can contact the team behind C#/XAML for HTML5 at: