Cshtml5 May 2026

– your C# runs in the browser! 6. CSHTML5 vs OpenSilver vs Blazor | Feature | Legacy CSHTML5 | OpenSilver (modern) | Blazor WebAssembly | |--------|----------------|----------------------|---------------------| | Active | ❌ No | ✅ Yes (MIT) | ✅ Yes | | .NET Version | .NET Framework 4.x | .NET 6,7,8 | .NET 6+ | | Language | C# + XAML | C# + XAML | C# + Razor/HTML | | Runs as | JS + HTML | JS + WebAssembly | WebAssembly | | Best for | Silverline migration | Silverlight/WPF migration | New .NET web apps | | UI Framework | WPF/Silverlight | WPF/Silverlight | Blazor components | Recommendation: If you're starting today , use OpenSilver (not legacy CSHTML5). If you're building a new web app from scratch, consider Blazor instead – but for migrating existing XAML code, OpenSilver is excellent. 7. Sample Output (What the User Sees) When you run the above code, the browser renders:

[____________________] (TextBox) [ Say Hello ] (Button) Hello, World! (TextBlock) cshtml5

ResultText.Text = $"Hello, InputBox.Text!"; – your C# runs in the browser

Right-click → Inspect Element reveals the generated HTML: If you're building a new web app from

You can use this as a . Topic: CSHTML5 – Running C# and XAML in the Browser 1. What is CSHTML5? CSHTML5 (C#/HTML5) is a compiler that translates C# and XAML (typically used with WPF or Silverlight) into HTML5 and JavaScript . This allows developers to build Rich Internet Applications (RIAs) that run inside any modern web browser without plugins. Important Note: The original "CSHTML5" project has evolved. Its modern, actively maintained successor is called OpenSilver (open-source, MIT license). The legacy CSHTML5 is no longer updated, but the concepts remain identical. Key Analogy: Think of it as "XAML for the Web" – like a reverse Blazor (C# to JS instead of WebAssembly). 2. How Does It Work? Instead of rewriting your C# business logic into JavaScript, CSHTML5/OpenSilver does this at compile time:

private void Button_Click(object sender, RoutedEventArgs e)