"ASP.NET Core gains native OpenTelemetry tracing support in this release. The framework now adds OpenTelemetry semantic attributes directly to HTTP server activity, meaning developers no longer need the separate instrumentation library to collect standard tracing data. Attributes such as request method, URL path, response status code, and server address are now populated automatically by the framework itself."
"Kestrel's HTTP/1.1 request parser has been reworked to avoid throwing exceptions on malformed requests. As stated, throughput improvements of 20 to 40 percent have been reported in high invalid-traffic scenarios such as port scanning or misconfigured clients."
"A new dotnet new webworker project template has also been introduced, allowing Blazor WebAssembly applications to offload heavy computations to a Web Worker without blocking the UI thread, keeping applications responsive during demanding operations."
Microsoft's .NET 11 preview 2 introduces significant enhancements across multiple platform components. ASP.NET Core now includes native OpenTelemetry tracing support, automatically populating semantic attributes like request method, URL path, and response status code without requiring separate instrumentation libraries. Blazor Server-Side Rendering gains TempData support for data persistence across HTTP requests, useful for flash messages and notifications. A new dotnet new webworker template enables Blazor WebAssembly applications to offload computations to Web Workers, maintaining UI responsiveness. Kestrel's HTTP/1.1 parser has been redesigned to handle malformed requests without exceptions, delivering 20-40 percent throughput improvements in high invalid-traffic scenarios. .NET MAUI's Map control receives simplified XAML syntax for coordinate definition and introduces a new Map.Region bindable property for declarative region configuration.
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