--- title: .NET 11 Preview 1 Arrives With Runtime Async, Zstandard... description: .NET 11 Preview 1 has been released, with Runtime Async as the headline feature — shifting async/await state machine handling from the C# compiler into the... canonical: https://daily.dev/posts/net-11-preview-1-arrives-with-runtime-async-zstandard-support-and-c-15-features-xpzz4nmo0 twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: .NET 11 Preview 1 Arrives With Runtime Async, Zstandard Support, and C# 15 Features | daily.dev og:description: .NET 11 Preview 1 has been released, with Runtime Async as the headline feature — shifting async/await state machine handling from the C# compiler into the... og:url: https://daily.dev/posts/net-11-preview-1-arrives-with-runtime-async-zstandard-support-and-c-15-features-xpzz4nmo0 og:image: https://api.daily.dev/og/posts/xPZZ4nMO0.png og:image:alt: .NET 11 Preview 1 Arrives With Runtime Async, Zstandard Support, and C# 15 Features 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 1 Arrives With Runtime Async, Zstandard Support, and C# 15 Features **[InfoQ](https://daily.dev/sources/infoq)** · 4 min read · 20 upvotes · 0 comments ## Summary .NET 11 Preview 1 has been released, with Runtime Async as the headline feature — shifting async/await state machine handling from the C# compiler into the runtime itself, enabling first-class async support including Native AOT. Other highlights include native Zstandard compression via ZstandardStream, a BFloat16 type for AI/ML workloads, foundational CoreCLR WebAssembly support (migrating from Mono), C# 15 collection expression arguments, F# parallel compilation by default, and numerous ASP.NET Core/Blazor improvements such as EnvironmentBoundary, IHostedService in Blazor WASM, and QuickGrid row click events. .NET MAUI gains XAML source generation by default. Community reaction is mixed: enthusiasm for Runtime Async and interactive dotnet run, but debate over C# 15 complexity and criticism that release notes appear AI-generated. .NET 11 is planned as a Standard Term Support release for November 2026. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Microsoft Releases .NET 11 Preview 3 with Updates Across Runtime, SDK, MAUI, and ASP.NET Core](https://daily.dev/posts/microsoft-releases-net-11-preview-3-with-updates-across-runtime-sdk-maui-and-asp-net-core-4tyjhbtqm) · InfoQ · 5 upvotes · 1 comments - [Microsoft unveils first preview of .NET 11](https://daily.dev/posts/microsoft-unveils-first-preview-of-net-11-4y7l7j8r0) · InfoWorld · 24 upvotes · 1 comments - [.NET 11 Preview 3 is now available\!](https://daily.dev/posts/net-11-preview-3-is-now-available--lmnwr3zsd) · .NET Blog · 52 upvotes · 2 comments --- Tags: [#.net](https://daily.dev/tags/.net), [#c#](https://daily.dev/tags/c#), [#webassembly](https://daily.dev/tags/webassembly), [#aspnetcore](https://daily.dev/tags/aspnetcore) [View this post on daily.dev](https://daily.dev/posts/net-11-preview-1-arrives-with-runtime-async-zstandard-support-and-c-15-features-xpzz4nmo0) ```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 1 Arrives With Runtime Async, Zstandard Support, and C# 15 Features","url":"https://daily.dev/posts/net-11-preview-1-arrives-with-runtime-async-zstandard-support-and-c-15-features-xpzz4nmo0","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/net-11-preview-1-arrives-with-runtime-async-zstandard-support-and-c-15-features-xpzz4nmo0"},"datePublished":"2026-02-21T09:06:14.308Z","dateModified":"2026-03-03T09:05:43.456Z","description":".NET 11 Preview 1 has been released, with Runtime Async as the headline feature — shifting async/await state machine handling from the C# compiler into the...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/6be93ab8aea1572f25901cddd8107f30?_a=AQAEuop","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/6be93ab8aea1572f25901cddd8107f30?_a=AQAEuop","isAccessibleForFree":true,"articleSection":"InfoQ","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"InfoQ","logo":"https://media.daily.dev/image/upload/t_logo,f_auto/v1/logos/afc3bced3e1e4b188dd9127017a60e0c","url":"https://daily.dev/sources/infoq"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/net-11-preview-1-arrives-with-runtime-async-zstandard-support-and-c-15-features-xpzz4nmo0","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":20},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":".net,c#,webassembly,aspnetcore","timeRequired":"PT4M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"InfoQ","item":"https://daily.dev/sources/infoq"},{"@type":"ListItem","position":3,"name":".NET 11 Preview 1 Arrives With Runtime Async, Zstandard Support, and C# 15 Features"}]} ```