Add comprehensive ASP.NET Core release notes for .NET 10 Preview 7 #10023

Copilot · 2025-08-07T22:14:28Z

This PR adds comprehensive ASP.NET Core release notes for .NET 10 Preview 7, documenting all major features and improvements in the release.

What's New in ASP.NET Core .NET 10 Preview 7

The release notes cover the following features and improvements:

🔧 Configure suppressing exception handler diagnostics

New ExceptionHandlerOptions.SuppressDiagnosticsCallback option for controlling diagnostic output
Updated default behavior to not log exceptions handled by IExceptionHandler
Addresses user feedback about unwanted error-level logging for handled exceptions

🔐 Avoid cookie login redirects for known API endpoints

API endpoints now return 401/403 status codes instead of redirecting to login pages
Automatic detection of API endpoints using new IApiEndpointMetadata interface
Highly requested feature that improves API authentication behavior

🔑 Passkey authentication improvements

Simplified APIs for passkey authentication in ASP.NET Core Identity
Built-in passkey support in Blazor Web App project template (dotnet new blazor -au Individual)
Updated to resemble what will ship in .NET 10 GA
Details on API changes from Preview 6 for upgrade guidance

🌐 Support for .localhost top-level domain

Full support for *.localhost domains in Kestrel server binding
Updated HTTPS development certificates to support *.dev.localhost
New --localhost-tld option in project templates for better local development

⚡ Use PipeReader support in System.Text.Json

Performance improvements for JSON deserialization in MVC and Minimal APIs
Automatic usage of new PipeReader support without code changes
Guidance for fixing custom JsonConverter implementations

📋 Enhanced validation for classes and records

Support for validation attributes on both classes and records
Consistent code generation and validation behavior
Enhanced flexibility when designing models using records

🔥 Blazor improvements

Resource preloader component renamed from LinkPreload to ResourcePreloader
Updated JavaScript APIs: Blazor.pauseCircuit() and Blazor.resumeCircuit()
Simplified C# attribute: PersistentStateAttribute
Enhanced NotFound support for custom routers
Improved diagnostic metrics and traces following OpenTelemetry conventions
WebAssembly host builder service provider configuration for better DI validation

📊 OpenAPI.NET dependency upgraded to stable release

Upgrade to Microsoft.OpenApi v2.0.0 (GA)
Multiple bug fixes and community contributions

Contributors

The release notes include a contributors section acknowledging external community contributors with direct links to their merged PRs for the 10.0-preview7 milestone.

Fixes #10022.

💬 Share your feedback on Copilot coding agent for the chance to win a $200 gift card! Click here to start the survey.

Copilot · 2025-08-07T22:14:30Z

@danroth27 👋 This repository doesn't have Copilot instructions. With Copilot instructions, I can understand the repository better, work faster and produce higher quality PRs.

I can generate a .github/copilot-instructions.md file for you automatically. Click here to open a pre-filled issue and assign it to me. I'll write the instructions, and then tag you for review.

release-notes/10.0/preview/preview7/aspnetcore.md

Co-authored-by: danroth27 <[email protected]>

Co-authored-by: Martin Costello <[email protected]>

danroth27

Good start!

release-notes/10.0/preview/preview7/aspnetcore.md

danroth27 · 2025-08-08T21:46:19Z

@copilot Please address all review feedback.

…anize content Co-authored-by: danroth27 <[email protected]>

Copilot · 2025-08-08T21:51:51Z

@copilot Please address all review feedback.

I've addressed all review feedback in commit 2102b57:

✅ Fixed heading capitalization from "Top-Level" to "top-level"
✅ Added feature sections for all requested PRs (#62673, #62549, #62078, #62754, #62751, #62629) and issue (#35861)
✅ Moved validation section from OpenAPI to its own separate feature section
✅ Removed all Microsoft contributors, keeping only external contributors

The release notes now include comprehensive coverage of all user-facing changes in .NET 10 Preview 7.

release-notes/10.0/preview/preview7/aspnetcore.md

danroth27 · 2025-08-09T05:38:33Z

@guardrex

captainsafia · 2025-08-10T02:06:20Z

@danroth27 Do we want to document the obsoletions that happened in preview7 in this post?

danroth27 · 2025-08-10T16:32:57Z

@danroth27 Do we want to document the obsoletions that happened in preview7 in this post?

All obsoletions are documented as breaking changes, which we then link to from here. No need to list them inline.

wadepickett

Edit pass/review: Looks good to me, I am not spotting any issues.

release-notes/10.0/preview/preview7/aspnetcore.md

jongalloway · 2025-08-11T21:49:42Z

@danroth27 Ready to merge?

…0006) * Add release notes for .NET 10 Preview 7 across various components * Remove outdated prompt for creating pull requests for Preview 7 * Add prompt for creating pull requests for .NET 10 Preview 7 * Update wpf for preview 7 (#10005) * Update wpf for preview 7 * Add details * Fix version * Update wpf.md * Update wpf.md --------- Co-authored-by: Andy (Steve) De George <[email protected]> Co-authored-by: Jon Galloway <[email protected]> * Update dotnetmaui for preview 7 (#9997) * Update dotnetmaui for preview 7 * Update dotnetmaui.md for preview 7 with copilot consolidation * Update release-notes/10.0/preview/preview7/dotnetmaui.md Co-authored-by: Jonathan Peppers <[email protected]> * Update dotnetmaui.md * Update dotnetmaui.md --------- Co-authored-by: David Ortinau <[email protected]> Co-authored-by: Jonathan Peppers <[email protected]> * Update winforms for preview 7 (#10004) * Update winforms for preview 7 * Update winforms readme.md --------- Co-authored-by: Klaus Löffelmann <[email protected]> * Update efcore for preview 7 (#9998) * Update efcore for preview 7 * Fill in EF 10 preview7 release notes * Update release-notes/10.0/preview/preview7/efcore.md Co-authored-by: Martin Costello <[email protected]> --------- Co-authored-by: Shay Rojansky <[email protected]> Co-authored-by: Martin Costello <[email protected]> * Update release-notes/10.0/preview/preview7/README.md Co-authored-by: Weihan Li <[email protected]> * Add comprehensive ASP.NET Core release notes for .NET 10 Preview 7 (#10023) * Update fsharp for preview 7 (#9999) * Update fsharp for preview 7 * Update release-notes/10.0/preview/preview7/fsharp.md --------- Co-authored-by: Jon Galloway <[email protected]> * Update sdk for preview 7 (#10002) * Update sdk for preview 7 * add notes about any RID support in .NET tools * Update release-notes/10.0/preview/preview7/sdk.md Co-authored-by: Martin Costello <[email protected]> * Update release-notes/10.0/preview/preview7/sdk.md Co-authored-by: Copilot <[email protected]> --------- Co-authored-by: Chet Husk <[email protected]> Co-authored-by: Chet Husk <[email protected]> Co-authored-by: Martin Costello <[email protected]> Co-authored-by: Jon Galloway <[email protected]> Co-authored-by: Copilot <[email protected]> * Update libraries for preview 7 (#10000) * Update libraries for preview 7 * Add notes for CreateNewProcessGroup * Update release-notes/10.0/preview/preview7/libraries.md * Update markdown link * Add cryptography notes * Add PipeReader support for JsonSerializer * change received to sent * Composite ML-DSA * clean up pqc bullet * update PipeReader blurb * Add WebSocketStream * Fix WebSocketStream link and add TLS 1.3 support for macOS client * Update TLS 1.3 notes for macOS Network.framework behavior and edge cases * Update release-notes/10.0/preview/preview7/libraries.md Co-authored-by: Copilot <[email protected]> * Update release-notes/10.0/preview/preview7/libraries.md Co-authored-by: Copilot <[email protected]> --------- Co-authored-by: David Cantú <[email protected]> Co-authored-by: Pranav Senthilnathan <[email protected]> Co-authored-by: Jeremy Barton <[email protected]> Co-authored-by: Natalia Kondratyeva <[email protected]> Co-authored-by: Ahmet Ibrahim Aksoy <[email protected]> Co-authored-by: Jon Galloway <[email protected]> Co-authored-by: Copilot <[email protected]> * Update csharp for preview 7 (#9996) * Update csharp for preview 7 * Add C# preview 7 features. Add the remaining C# 14 features delivered in .NET 10 preview 7. * Update release-notes/10.0/preview/preview7/csharp.md Co-authored-by: Copilot <[email protected]> * Update release-notes/10.0/preview/preview7/csharp.md Co-authored-by: Copilot <[email protected]> --------- Co-authored-by: Bill Wagner <[email protected]> Co-authored-by: Jon Galloway <[email protected]> Co-authored-by: Copilot <[email protected]> * Update containers for preview 7 (#9995) * Update containers for preview 7 * Add dnx feature notes --------- Co-authored-by: Logan Bussell <[email protected]> * Update runtime for preview 7 (#10001) * Update runtime for preview 7 * Update release-notes/10.0/preview/preview7/runtime.md --------- Co-authored-by: Jon Galloway <[email protected]> * Update 10.0.0-preview.7.md * Update README.md * Update releases.md * Update README.md * Update releases-index.json * Update README.md * Update releases.json * Update install-linux.md * Update install-macos.md * Update install-windows.md * Create release.json * Update markdown files and release notes for Preview 7 * Update release notes for Preview 7: add missing WPF entry, fix formatting in ASP.NET Core, SDK, and Windows Forms notes * fix winforms * Update markdown link check workflow to allow all branches for pull requests and fix JSON formatting in release notes * Remove feature summaries from F# and Visual Basic release notes for Preview 7 * Update release-notes/10.0/preview/preview7/csharp.md Co-authored-by: Bill Wagner <[email protected]> --------- Co-authored-by: Andy (Steve) De George <[email protected]> Co-authored-by: Jon Galloway <[email protected]> Co-authored-by: David Ortinau <[email protected]> Co-authored-by: Jonathan Peppers <[email protected]> Co-authored-by: Klaus Löffelmann <[email protected]> Co-authored-by: Shay Rojansky <[email protected]> Co-authored-by: Martin Costello <[email protected]> Co-authored-by: Weihan Li <[email protected]> Co-authored-by: Copilot <[email protected]> Co-authored-by: Chet Husk <[email protected]> Co-authored-by: Chet Husk <[email protected]> Co-authored-by: Copilot <[email protected]> Co-authored-by: David Cantú <[email protected]> Co-authored-by: Pranav Senthilnathan <[email protected]> Co-authored-by: Jeremy Barton <[email protected]> Co-authored-by: Natalia Kondratyeva <[email protected]> Co-authored-by: Ahmet Ibrahim Aksoy <[email protected]> Co-authored-by: Bill Wagner <[email protected]> Co-authored-by: Logan Bussell <[email protected]> Co-authored-by: victorisr <[email protected]>

Copilot AI assigned Copilot and danroth27 Aug 7, 2025

Copilot started work on behalf of danroth27 August 7, 2025 22:14 View session

Copilot AI changed the title ~~[WIP] Add ASP.NET Core release notes for .NET 10 Preview 7~~ Add ASP.NET Core release notes for .NET 10 Preview 7 Aug 7, 2025

Copilot AI requested a review from danroth27 August 7, 2025 22:31

Copilot finished work on behalf of danroth27 August 7, 2025 22:31

martincostello reviewed Aug 8, 2025

View reviewed changes

release-notes/10.0/preview/preview7/aspnetcore.md Outdated Show resolved Hide resolved

jongalloway mentioned this pull request Aug 8, 2025

Update aspnetcore for preview 7 #9994

Closed

danroth27 changed the base branch from main to dotnet10-p7 August 8, 2025 21:02

danroth27 force-pushed the copilot/fix-10022 branch from 7072975 to 85ba430 Compare August 8, 2025 21:27

Copilot AI and others added 3 commits August 8, 2025 14:28

Initial plan

99b6672

Add ASP.NET Core release notes for .NET 10 Preview 7

672f5a7

Co-authored-by: danroth27 <[email protected]>

Update release-notes/10.0/preview/preview7/aspnetcore.md

49d5500

Co-authored-by: Martin Costello <[email protected]>

danroth27 force-pushed the copilot/fix-10022 branch from 85ba430 to 49d5500 Compare August 8, 2025 21:28

danroth27 requested changes Aug 8, 2025

View reviewed changes

Copilot started work on behalf of danroth27 August 8, 2025 21:46 View session

Address all review feedback: fix heading, add feature sections, reorg…

2102b57

…anize content Co-authored-by: danroth27 <[email protected]>

Copilot AI changed the title ~~Add ASP.NET Core release notes for .NET 10 Preview 7~~ Add comprehensive ASP.NET Core release notes for .NET 10 Preview 7 Aug 8, 2025

Copilot finished work on behalf of danroth27 August 8, 2025 21:53

Copilot AI requested a review from danroth27 August 8, 2025 21:53

danroth27 reviewed Aug 9, 2025

View reviewed changes

release-notes/10.0/preview/preview7/aspnetcore.md Outdated Show resolved Hide resolved

danroth27 reviewed Aug 9, 2025

View reviewed changes

release-notes/10.0/preview/preview7/aspnetcore.md Outdated Show resolved Hide resolved

danroth27 reviewed Aug 9, 2025

View reviewed changes

release-notes/10.0/preview/preview7/aspnetcore.md Outdated Show resolved Hide resolved

danroth27 reviewed Aug 9, 2025

View reviewed changes

release-notes/10.0/preview/preview7/aspnetcore.md Show resolved Hide resolved

danroth27 reviewed Aug 9, 2025

View reviewed changes

release-notes/10.0/preview/preview7/aspnetcore.md Outdated Show resolved Hide resolved

danroth27 reviewed Aug 9, 2025

View reviewed changes

release-notes/10.0/preview/preview7/aspnetcore.md Outdated Show resolved Hide resolved

danroth27 reviewed Aug 9, 2025

View reviewed changes

release-notes/10.0/preview/preview7/aspnetcore.md Outdated Show resolved Hide resolved

danroth27 requested review from lewing, halter73, DamianEdwards, pavelsavara, danmoseley, javiercn, BrennanConroy, joperezr, ilonatommy, mikekistler and JamesNK August 9, 2025 05:37

danroth27 requested review from tdykstra, wadepickett, MackinnonBuck and captainsafia August 9, 2025 05:38

wadepickett approved these changes Aug 10, 2025

View reviewed changes

wadepickett mentioned this pull request Aug 8, 2025

Update "What's new in ASP.NET Core in .NET 10" for .NET 10 Preview 7 dotnet/AspNetCore.Docs#35824

Closed

MackinnonBuck reviewed Aug 11, 2025

View reviewed changes

release-notes/10.0/preview/preview7/aspnetcore.md Outdated Show resolved Hide resolved

danroth27 reviewed Aug 11, 2025

View reviewed changes

release-notes/10.0/preview/preview7/aspnetcore.md Outdated Show resolved Hide resolved

Update release-notes/10.0/preview/preview7/aspnetcore.md

ce5f095

danroth27 reviewed Aug 11, 2025

View reviewed changes

release-notes/10.0/preview/preview7/aspnetcore.md Show resolved Hide resolved

Update release-notes/10.0/preview/preview7/aspnetcore.md

7f8e412

Merge branch 'dotnet10-p7' into copilot/fix-10022

f51e37d

danroth27 merged commit 029c33b into dotnet10-p7 Aug 12, 2025
2 checks passed

danroth27 deleted the copilot/fix-10022 branch August 12, 2025 14:12

Add comprehensive ASP.NET Core release notes for .NET 10 Preview 7 #10023

Add comprehensive ASP.NET Core release notes for .NET 10 Preview 7 #10023

Uh oh!

Conversation

Copilot AI commented Aug 7, 2025 • edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

What's New in ASP.NET Core .NET 10 Preview 7

🔧 Configure suppressing exception handler diagnostics

🔐 Avoid cookie login redirects for known API endpoints

🔑 Passkey authentication improvements

🌐 Support for .localhost top-level domain

⚡ Use PipeReader support in System.Text.Json

📋 Enhanced validation for classes and records

🔥 Blazor improvements

📊 OpenAPI.NET dependency upgraded to stable release

Contributors

Uh oh!

Copilot AI commented Aug 7, 2025

Uh oh!

Uh oh!

danroth27 left a comment

Choose a reason for hiding this comment

Uh oh!

Uh oh!

Uh oh!

Uh oh!

Uh oh!

danroth27 commented Aug 8, 2025

Uh oh!

Copilot AI commented Aug 8, 2025

Uh oh!

Uh oh!

Uh oh!

Uh oh!

Uh oh!

Uh oh!

Uh oh!

Uh oh!

danroth27 commented Aug 9, 2025

Uh oh!

captainsafia commented Aug 10, 2025

Uh oh!

danroth27 commented Aug 10, 2025

Uh oh!

wadepickett left a comment • edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Choose a reason for hiding this comment

Uh oh!

Uh oh!

Uh oh!

Uh oh!

jongalloway commented Aug 11, 2025

Uh oh!

Uh oh!

Uh oh!

Copilot AI commented Aug 7, 2025 •

edited

Loading

wadepickett left a comment •

edited

Loading