Uno Platform is an open-source environment for building multi-platform applications using C#, WinUI, and XAML from a single codebase.

Hosting Uno Platform WASM on AWS Amplify

Blazor is a feature of ASP.NET for building interactive web UIs using C# instead of JavaScript.

Deploy .NET Blazor WebAssembly Application to AWS Amplify

.NET is a free and open-source project, on GitHub, performing faster than any other popular framework, according to TechEmpower. .NET helps you build apps for web, mobile, desktop.
