{"id":635165,"date":"2026-10-19T10:16:10","date_gmt":"2026-10-19T10:16:10","guid":{"rendered":"https:\/\/www.newsbeep.com\/nz\/635165\/"},"modified":"2026-10-19T10:16:10","modified_gmt":"2026-10-19T10:16:10","slug":"net-11-release-candidate-2-go-live-license-and-updates-across-libraries-f-maui-and-winforms","status":"publish","type":"post","link":"https:\/\/www.newsbeep.com\/nz\/635165\/","title":{"rendered":".NET 11 Release Candidate 2: Go-Live License and Updates Across Libraries, F#, MAUI, and WinForms"},"content":{"rendered":"

Microsoft has released .NET 11 Release Candidate 2<\/a> with a go-live license for production use, as stated in the announcement. The build is supported in Visual Studio 2026 Insiders<\/a> and in Visual Studio Code with the C# Dev Kit. As reported, it brings changes across the libraries, runtime, SDK, NuGet, F#, ASP.NET Core, .NET MAUI, and Windows Forms, with no new C# language features.<\/p>\n

In the libraries, CborReader<\/a> can now read a payload delivered in chunks, using isFinalBlock and SlideData, in Lax conformance mode only. Two experimental cryptography types<\/a> arrive: CompositeMLKem combines post-quantum and classical key encapsulation, and Hpke provides Hybrid Public Key Encryption with classical DHKEM suites only.<\/p>\n

Both require opting in through SYSLIB5009 and SYSLIB5006, as described in the release notes. ValidationAttribute.FormatMessage<\/a> lets a host supply a message template for the attribute to fill in, and SocketsHttpHandler.InitialHttp2MaxConcurrentStreams caps streams on a new HTTP\/2 connection until the server’s SETTINGS frame arrives.<\/p>\n

The runtime release focuses on reliability but carries one breaking change. CoreCLR now disables advisory file locking by default on iOS and tvOS<\/a>, because, as stated,\u00a0FileStream lock in RC 1 could cause the OS to terminate an app entering the background. FileShare restrictions are no longer enforced there, and setting DOTNET_SYSTEM_IO_DISABLEFILELOCKING to 0 restores locking, according to the release.<\/p>\n

ASP.NET Core has few new features but several changes for apps upgrading from RC 1. QuickGrid’s<\/a> AnchorMode and ItemComparer parameters are no longer experimental. IValidationMessageFormatter<\/a> has been removed in favor of FormatMessage, the Blazor BasePath component moved to the Microsoft.AspNetCore.Components namespace, and the experimental device-bound sessions package was pulled from this build. As reported, the remaining AddRazorRuntimeCompilation overloads<\/a> now warn with ASPDEPR003.<\/p>\n

In the SDK, file-based programs accept quoted values in #:property directives<\/a>, and the #:package, #:project, and #:ref directives take trailing Name=Value item metadata. MSBuild gains faster wildcard matching during project evaluation, which, as reported in Microsoft’s Windows benchmarks, puts it at 10\u201313% faster with 16\u201334% fewer allocations.<\/p>\n

NuGet adds –min-publish-age-hours<\/a> to dotnet nuget add source and update source, and restore fails with NU1020 when a package cooldown leaves no eligible floating version.<\/p>\n

F# ships several preview features. The compiler gains return and await intrinsics for building custom computation-expression<\/a> builders on the runtime-async model, though FSharp.Core does not yet ship such a builder, as stated in the notes.<\/p>\n


\nlet calculation () =
\n runtimeTask {
\n let captured = 40
\n let! delta = delayed 2
\n return captured + delta
\n }<\/p>\n

The\u00a0reraise()<\/a> now works inside the with handler of async and task expressions. Outside preview, more List and Array<\/a> functions inline their callbacks to cut allocations, Async.parallelLimit<\/a> bounds concurrent work, and bitwise operators on non-integer enums<\/a> now fail at compile time with FS0001.<\/p>\n

The .NET MAUI maui template gains a –ui csharp option<\/a> that generates the app, shell, and main page in C# rather than XAML, and the multi-project template adds an –avalonia option for an Avalonia desktop project.<\/p>\n

MauiIcon accepts Apple Icon Composer .icon bundles<\/a>, and UseiOSShellHandler<\/a> opts into a handler-based Shell on Apple platforms. Android adds API 37.2 bindings and JDK 25 support<\/a>, while Apple workloads now require Xcode 27.0 and apps built with its SDKs must adopt the UIKit scene lifecycle, as described in the breaking changes<\/a>.<\/p>\n

Windows Forms refines the .NET 11 visual styles<\/a>. Application.SetDefaultVisualStylesMode selects the renderer version, but ToolStrip and DataGridView keep Classic rendering even under Net11 for now. Application.SystemVisualSettings<\/a> exposes a snapshot of the Windows accent color, text scaling, and high-contrast state, and FormRevealMode<\/a> defers a top-level form’s first presentation to reduce background flashes.<\/p>\n

New analyzers WFO3000 to WFO3002<\/a> flag code that cannot round-trip through the Designer, which the release notes say is particularly useful when AI tools generate or refactor forms.<\/p>\n

Other changes in this release are MSBuild property expansion in launch-profile arguments<\/a>, an F# RequireNamedArgumentsAttribute<\/a>, a private-member R8 obfuscation default on Android, SuspendPainting<\/a> and KioskModeManager<\/a> for Windows Forms, EF Core SaveChanges and JSON projection fixes.<\/p>\n

On Reddit<\/a>, discussion focused less on the features than on upgrade cadence. Commenters asked how many teams still skip odd-numbered releases, and others replied that since .NET 9 a standard-term release shares its end-of-support date with the preceding LTS version, moving to .NET 11 costs no support time.<\/p>\n

Other developers reported MAUI workloads breaking on every preview upgrade, questioned Blazor server-side rendering performance against Razor Pages and MVC, and welcomed the KioskModeManager component for Windows Forms.<\/p>\n

For interested readers and developers, the full release notes for .NET 11 RC 2 are available on the\u00a0dotnet\/core repository<\/a>\u00a0on GitHub.<\/p>\n","protected":false},"excerpt":{"rendered":"Microsoft has released .NET 11 Release Candidate 2 with a go-live license for production use, as stated in…\n","protected":false},"author":2,"featured_media":635166,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6],"tags":[28670,184520,28672,170,311360,11781,111,139,69,145],"class_list":["post-635165","post","type-post","status-publish","format-standard","has-post-thumbnail","category-technology","tag-net-10","tag-net-11","tag-net-9","tag-development","tag-dotnet-11-rc-2","tag-net","tag-new-zealand","tag-newzealand","tag-nz","tag-technology"],"_links":{"self":[{"href":"https:\/\/www.newsbeep.com\/nz\/wp-json\/wp\/v2\/posts\/635165","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.newsbeep.com\/nz\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.newsbeep.com\/nz\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/nz\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/nz\/wp-json\/wp\/v2\/comments?post=635165"}],"version-history":[{"count":0,"href":"https:\/\/www.newsbeep.com\/nz\/wp-json\/wp\/v2\/posts\/635165\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/nz\/wp-json\/wp\/v2\/media\/635166"}],"wp:attachment":[{"href":"https:\/\/www.newsbeep.com\/nz\/wp-json\/wp\/v2\/media?parent=635165"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.newsbeep.com\/nz\/wp-json\/wp\/v2\/categories?post=635165"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.newsbeep.com\/nz\/wp-json\/wp\/v2\/tags?post=635165"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}