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Add component release guidance and any maintained feature-validation fixtures for owner review. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Copilot-Session: 637615df-deba-4407-bf00-9a3bd4e569b5
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Copilot-Session: 637615df-deba-4407-bf00-9a3bd4e569b5
Add the component link alongside its matching release note. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Copilot-Session: 637615df-deba-4407-bf00-9a3bd4e569b5
Retain component-owned index link and pick up current main for push validation. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Copilot-Session: 637615df-deba-4407-bf00-9a3bd4e569b5
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Copilot-Session: 637615df-deba-4407-bf00-9a3bd4e569b5
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Copilot-Session: 637615df-deba-4407-bf00-9a3bd4e569b5
danroth27
marked this pull request as ready for review
September 27, 2026 17:38
danroth27
requested review from
BrennanConroy,
DeagleGross,
SamMonoRT,
Youssef1313,
davpetr,
halter73,
ilonatommy,
javiercn,
kotlarmilos and
rokonec
September 27, 2026 17:43
DeagleGross
reviewed
Sep 28, 2026
danroth27
commented
Sep 28, 2026
oroztocil
reviewed
Sep 30, 2026
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| ## Changes since the previous preview | ||
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| - **Validation message formatting:** `IValidationMessageFormatter`, introduced during .NET 11 previews, has been removed. Custom validation attributes should override the BCL `ValidationAttribute.FormatMessage(string format, string name)` method instead; RC 2 validation uses that method ([dotnet/aspnetcore #69116](https://github.com/dotnet/aspnetcore/pull/69116), [dotnet/runtime #132853](https://github.com/dotnet/runtime/pull/132853)). |
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Suggested change
| - **Validation message formatting:** `IValidationMessageFormatter`, introduced during .NET 11 previews, has been removed. Custom validation attributes should override the BCL `ValidationAttribute.FormatMessage(string format, string name)` method instead; RC 2 validation uses that method ([dotnet/aspnetcore #69116](https://github.com/dotnet/aspnetcore/pull/69116), [dotnet/runtime #132853](https://github.com/dotnet/runtime/pull/132853)). | |
| - **Validation message formatting:** `IValidationMessageFormatter`, introduced during .NET 11 previews, has been removed. Custom validation attributes should override the base `ValidationAttribute.FormatMessage(string format, string name)` method instead if they want to include custom arguments in the localized error message. The `Microsoft.Extensions.Validation` pipeline uses the new `FormatMessage` method since RC2. ([dotnet/aspnetcore #69116](https://github.com/dotnet/aspnetcore/pull/69116), [dotnet/runtime #132853](https://github.com/dotnet/runtime/pull/132853)). |
oroztocil
reviewed
Sep 30, 2026
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| ## Bug fixes | ||
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| - **Validation:** The validation generator discovers C# union case types, and Blazor client-side validation handles custom attributes ([dotnet/aspnetcore #68846](https://github.com/dotnet/aspnetcore/pull/68846), [dotnet/aspnetcore #69026](https://github.com/dotnet/aspnetcore/pull/69026)). |
Member
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Suggested change
| - **Validation:** The validation generator discovers C# union case types, and Blazor client-side validation handles custom attributes ([dotnet/aspnetcore #68846](https://github.com/dotnet/aspnetcore/pull/68846), [dotnet/aspnetcore #69026](https://github.com/dotnet/aspnetcore/pull/69026)). | |
| - **Validation:** The validation generator discovers C# union case types, and Blazor client-side validation better supports custom validation attributes ([dotnet/aspnetcore #68846](https://github.com/dotnet/aspnetcore/pull/68846), [dotnet/aspnetcore #69026](https://github.com/dotnet/aspnetcore/pull/69026)). |
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Draft ASP.NET Core release notes for .NET 11 RC 2, based on the exact pinned build described in base PR #10601. Please review the technical claims and refine the prose before marking ready for review.
This PR targets the shared RC 2 release-notes branch. The component owner is responsible for merging it into that branch after review; the base PR remains a draft until the milestone ships.