Summary: "Build better web apps with Blazor in .NET 10"

• Presenter: Daniel Roth, Principal Product Manager for ASP.NET Core and Blazor.
• Key Focus: The video showcases how Blazor in .NET 10 enables secure, high-performance, and developer-friendly web app development entirely in C#, with no need for JavaScript.

Main Topics and Enhancements:

• Security and Authentication:
  • Built-in support for passwordless authentication using WebAuthN and passkeys.
  • New authentication scaffolders, including easier setup for Entra ID.
  • Passkeys are integrated into the Blazor template, allowing users to authenticate with cryptographic credentials managed by an authenticator app.
• Observability & Diagnostics:
  • Enhanced metrics for Blazor apps: page navigations, UI events, active circuits (current app users), and more.
  • Improved tracing and diagnostic tools for both Blazor Server and WebAssembly, including collecting performance profiles and memory dumps, which can be analyzed in Visual Studio.
  • .NET Aspire integration supporting distributed tracing and diagnostics dashboards.
• Performance:
  • Major framework optimizations: fingerprinted/pre-compressed/cached scripts, faster app startup and rendering (20% faster component rendering on WebAssembly compared to .NET 9).
  • Real-world improvements, e.g., Copilot Studio saw significant load/execution gains by upgrading from .NET 6 to .NET 8.
• Developer Experience:
  • Faster and more reliable Hot Reload (Visual Studio 2026 vs 2022: down from 40s to 3s for big apps).
  • Component state persistence, simplifying pre-rendering and improving resilience/scalability (automatic persistence for disconnected circuits).
  • Enhanced form validation, supporting deep/nested models.
  • Improved navigation, error handling, and integration testing (Kestrel + Playwright browser tests).
  • QuickGrid and JavaScript interop enhancements.
• Use Cases Highlighted:
  • "My Ride K-2" app for US/Canada schools demonstrates cross-platform agility.
  • LKAB (Europe’s largest iron ore producer) unified their mobile strategy using Blazor/.NET MAUI.
  • Blazor's powerful SSR model enabling rich interactive AI experiences (with provided chat template).
• Conclusion: Blazor in .NET 10 delivers major improvements in security, performance, diagnostics, and developer productivity, streamlining full-stack development in C# and .NET for web and cross-platform apps. Developers are encouraged to start using Blazor in .NET 10 and explore these new features.youtube

1. https://www.youtube.com/watch?v=V0Af7y7aMBE