--- title: .NET 11 Preview 2 Brings Performance Gains, Improved... description: Microsoft has released .NET 11 Preview 2 with improvements across the platform. ASP.NET Core now includes native OpenTelemetry tracing, automatically... canonical: https://daily.dev/posts/net-11-preview-2-brings-performance-gains-improved-mapping-and-native-opentelemetry-support-1t5uposcx twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: .NET 11 Preview 2 Brings Performance Gains, Improved Mapping, and Native OpenTelemetry Support | daily.dev og:description: Microsoft has released .NET 11 Preview 2 with improvements across the platform. ASP.NET Core now includes native OpenTelemetry tracing, automatically... og:url: https://daily.dev/posts/net-11-preview-2-brings-performance-gains-improved-mapping-and-native-opentelemetry-support-1t5uposcx og:image: https://api.daily.dev/og/posts/1t5Uposcx.png og:image:alt: .NET 11 Preview 2 Brings Performance Gains, Improved Mapping, and Native OpenTelemetry Support og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # .NET 11 Preview 2 Brings Performance Gains, Improved Mapping, and Native OpenTelemetry Support **[InfoQ](https://daily.dev/sources/infoq)** · 3 min read · 6 upvotes · 0 comments ## Summary Microsoft has released .NET 11 Preview 2 with improvements across the platform. ASP.NET Core now includes native OpenTelemetry tracing, automatically populating HTTP server activity attributes without requiring a separate instrumentation library. Blazor Server-Side Rendering gains TempData support for persisting data across requests, and a new Web Worker project template enables offloading heavy computations in Blazor WebAssembly. Kestrel's HTTP/1.1 parser was reworked, delivering 20–40% throughput gains in high invalid-traffic scenarios. .NET MAUI sees major Map control improvements including XAML coordinate syntax, visibility toggling, ZIndex control, and click events on Android and iOS, plus ~29% faster bindings with 50% less memory allocation. F# gains the #elif preprocessor directive, a new partitionWith collection function, overload resolution caching that cuts type-checking time from 6.5s to 2.9s, and Big-O complexity notes in IDE tooltips for all 462 collection functions. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [.NET 11 Preview 2 is now available\!](https://daily.dev/posts/net-11-preview-2-is-now-available--iazytiw2q) · .NET Blog · 21 upvotes · 0 comments --- Tags: [#.net](https://daily.dev/tags/.net), [#blazor](https://daily.dev/tags/blazor), [#opentelemetry](https://daily.dev/tags/opentelemetry), [#.net-maui](https://daily.dev/tags/.net-maui), [#aspnetcore](https://daily.dev/tags/aspnetcore) [View this post on daily.dev](https://daily.dev/posts/net-11-preview-2-brings-performance-gains-improved-mapping-and-native-opentelemetry-support-1t5uposcx) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":".NET 11 Preview 2 Brings Performance Gains, Improved Mapping, and Native OpenTelemetry Support","url":"https://daily.dev/posts/net-11-preview-2-brings-performance-gains-improved-mapping-and-native-opentelemetry-support-1t5uposcx","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/net-11-preview-2-brings-performance-gains-improved-mapping-and-native-opentelemetry-support-1t5uposcx"},"datePublished":"2026-03-19T09:48:05.939Z","dateModified":"2026-03-19T09:48:29.173Z","description":"Microsoft has released .NET 11 Preview 2 with improvements across the platform. 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