--- title: Explore the Future of ASP.NET Core & Blazor in .NET 11 description: Daniel Roth, principal product manager for ASP.NET Core and Blazor, walks through .NET 11 preview 6 features across six themes: performance and security... canonical: https://daily.dev/posts/explore-the-future-of-asp-net-core-blazor-in-net-11-7kkbyftph twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Explore the Future of ASP.NET Core & Blazor in .NET 11 | daily.dev og:description: Daniel Roth, principal product manager for ASP.NET Core and Blazor, walks through .NET 11 preview 6 features across six themes: performance and security... og:url: https://daily.dev/posts/explore-the-future-of-asp-net-core-blazor-in-net-11-7kkbyftph og:image: https://api.daily.dev/og/posts/7KkByfTph.png og:image:alt: Explore the Future of ASP.NET Core & Blazor in .NET 11 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. # Explore the Future of ASP.NET Core & Blazor in .NET 11 **[.NET Blog](https://daily.dev/sources/dotnet)** · 77 min read · 4 upvotes · 0 comments ## Summary Daniel Roth, principal product manager for ASP.NET Core and Blazor, walks through .NET 11 preview 6 features across six themes: performance and security hardening (Kestrel TLS handshake improvements, Zstandard compression, cross-site request forgery protection via fetch metadata headers, device-bound session credentials, SignalR auth token refresh), native OpenTelemetry semantic conventions including Blazor WebAssembly client telemetry, async validation for minimal APIs and Blazor forms, expanded static server-side rendering support (client validation without interactivity, QuickGrid without WebAssembly/SignalR, temp data, label/display name components), Blazor WebAssembly runtime consolidation from Mono to CoreCLR with a new Blazor web worker template for offloading CPU work, improved virtualization (variable height items, anchor modes, scroll-to-index), C# 15 union types support in minimal APIs and OpenAPI 3.2, and integration plans for agentic web apps via Microsoft Agent Framework and MCP. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Questions this post answers ### What is new for Blazor static server-side rendering in .NET 11? Blazor static server-side rendering gains client-side form validation without enabling an interactive render mode, a QuickGrid component that supports paging, filtering, and sorting without WebAssembly or SignalR, plus new label, display name, environment view components, and a supply-parameter-from-temp-data attribute for post-redirect-get patterns. These close longstanding feature gaps compared to MVC and Razor Pages. _Track .NET 11 Blazor rendering changes on daily.dev as you plan server-side rendering upgrades._ ### How does async validation work in ASP.NET Core minimal APIs and Blazor in .NET 11? Async validation lets validation logic perform long-running operations, such as database lookups, without blocking, using the new AsyncValidationAttribute with an IsValidAsync method or the IAsyncValidatableObject interface with a ValidateAsync method. Synchronous validation rules run first, and async rules run afterward in parallel, shared across both minimal APIs and Blazor via Microsoft.Extensions.Validation built on data annotations. _Developers wiring up form validation can follow .NET 11's async validation rollout on daily.dev._ ### Is the .NET WebAssembly runtime moving from Mono to CoreCLR, and when? The .NET WebAssembly runtime is being consolidated from Mono to CoreCLR, previewing in .NET 11 with a stable release expected in .NET 12. New WebAssembly capabilities like multi-threading and memory64 support will be built on the CoreCLR runtime rather than Mono. In the meantime, .NET 11 adds a Blazor web worker project template to offload CPU-intensive work off the UI thread without true multi-threading. _Teams planning Blazor WebAssembly upgrades can watch the CoreCLR migration timeline on daily.dev._ ## Similar posts on daily.dev - [ASP.NET Core in .NET 10: Major Updates Across Blazor, APIs, and OpenAPI](https://daily.dev/posts/asp-net-core-in-net-10-major-updates-across-blazor-apis-and-openapi-pt3fiswfo) · InfoQ · 17 upvotes · 0 comments - [What’s New in ASP.NET Core 10 for .NET 10: Key Features and Enhancements](https://daily.dev/posts/what-s-new-in-asp-net-core-10-for-net-10-key-features-and-enhancements-zal4icrde) · Syncfusion · 17 upvotes · 1 comments --- Tags: [#.net](https://daily.dev/tags/.net), [#webassembly](https://daily.dev/tags/webassembly), [#blazor](https://daily.dev/tags/blazor), [#aspnetcore](https://daily.dev/tags/aspnetcore) [View this post on daily.dev](https://daily.dev/posts/explore-the-future-of-asp-net-core-blazor-in-net-11-7kkbyftph) ```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":"Explore the Future of ASP.NET Core & Blazor in .NET 11","url":"https://daily.dev/posts/explore-the-future-of-asp-net-core-blazor-in-net-11-7kkbyftph","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/explore-the-future-of-asp-net-core-blazor-in-net-11-7kkbyftph"},"datePublished":"2026-08-19T16:18:15.856Z","dateModified":"2026-08-19T16:18:45.365Z","description":"Daniel Roth, principal product manager for ASP.NET Core and Blazor, walks through .NET 11 preview 6 features across six themes: performance and security...","image":"https://i.ytimg.com/vi/6c8fpShFjZE/sddefault.jpg","thumbnailUrl":"https://i.ytimg.com/vi/6c8fpShFjZE/sddefault.jpg","isAccessibleForFree":true,"articleSection":".NET Blog","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":".NET Blog","logo":"https://media.daily.dev/image/upload/t_logo,f_auto/v1/logos/f23eb59371bd4f07aeef64c4eef73266","url":"https://daily.dev/sources/dotnet"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/explore-the-future-of-asp-net-core-blazor-in-net-11-7kkbyftph","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":4},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":".net,webassembly,blazor,aspnetcore","timeRequired":"PT77M","video":{"@type":"VideoObject","name":"Explore the Future of ASP.NET Core & Blazor in .NET 11","description":"Daniel Roth, principal product manager for ASP.NET Core and Blazor, walks through .NET 11 preview 6 features across six themes: performance and security...","thumbnailUrl":"https://i.ytimg.com/vi/6c8fpShFjZE/sddefault.jpg","uploadDate":"2026-08-19T16:18:15.856Z","duration":"PT77M","url":"https://api.daily.dev/r/7KkByfTph","embedUrl":"https://www.youtube.com/embed/6c8fpShFjZE"}} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":".NET Blog","item":"https://daily.dev/sources/dotnet"},{"@type":"ListItem","position":3,"name":"Explore the Future of ASP.NET Core & Blazor in .NET 11"}]} {"@context":"https://schema.org","@type":"FAQPage","@id":"https://daily.dev/posts/explore-the-future-of-asp-net-core-blazor-in-net-11-7kkbyftph#faq","mainEntity":[{"@type":"Question","name":"What is new for Blazor static server-side rendering in .NET 11?","acceptedAnswer":{"@type":"Answer","text":"Blazor static server-side rendering gains client-side form validation without enabling an interactive render mode, a QuickGrid component that supports paging, filtering, and sorting without WebAssembly or SignalR, plus new label, display name, environment view components, and a supply-parameter-from-temp-data attribute for post-redirect-get patterns. These close longstanding feature gaps compared to MVC and Razor Pages. Track .NET 11 Blazor rendering changes on daily.dev as you plan server-side rendering upgrades."}},{"@type":"Question","name":"How does async validation work in ASP.NET Core minimal APIs and Blazor in .NET 11?","acceptedAnswer":{"@type":"Answer","text":"Async validation lets validation logic perform long-running operations, such as database lookups, without blocking, using the new AsyncValidationAttribute with an IsValidAsync method or the IAsyncValidatableObject interface with a ValidateAsync method. Synchronous validation rules run first, and async rules run afterward in parallel, shared across both minimal APIs and Blazor via Microsoft.Extensions.Validation built on data annotations. Developers wiring up form validation can follow .NET 11's async validation rollout on daily.dev."}},{"@type":"Question","name":"Is the .NET WebAssembly runtime moving from Mono to CoreCLR, and when?","acceptedAnswer":{"@type":"Answer","text":"The .NET WebAssembly runtime is being consolidated from Mono to CoreCLR, previewing in .NET 11 with a stable release expected in .NET 12. New WebAssembly capabilities like multi-threading and memory64 support will be built on the CoreCLR runtime rather than Mono. In the meantime, .NET 11 adds a Blazor web worker project template to offload CPU-intensive work off the UI thread without true multi-threading. Teams planning Blazor WebAssembly upgrades can watch the CoreCLR migration timeline on daily.dev."}}]} ```