Update "What's new in ASP.NET Core in .NET 10" for .NET 10 Preview 7

[danroth27]

Description

Update "What's new in ASP.NET Core in .NET 10" for .NET 10 Preview 7.

Also see related: [added by wadepickett]
dotnet/core#10023 (review)

Page URL

https://learn.microsoft.com/en-us/aspnet/core/release-notes/aspnetcore-10.0?view=aspnetcore-9.0

Content source URL

https://github.com/dotnet/AspNetCore.Docs/blob/main/aspnetcore/release-notes/aspnetcore-10.0.md

Document ID

a7ad4b01-2333-32d8-b759-e044edfb9102

Platform Id

2f8fb8ab-5309-0a77-987a-c867c6517d2b

Article author

@wadepickett

Metadata

• ID: a7ad4b01-2333-32d8-b759-e044edfb9102
• PlatformId: 2f8fb8ab-5309-0a77-987a-c867c6517d2b
• Service: aspnet-core
• Sub-service: release-notes

Related Issues

[JamesNK]

Metrics was added to identity in preview 7 - dotnet/aspnetcore#62078. But there will be some name changes based on feedback. I'd rather wait until the next release to announce it publicly.

[JamesNK]

Configure suppressing exception handler diagnostics

• Update What's new: Assigned to tdykstra.
• Update docs tracking issue: Document new ExceptionHandlerOptions.SuppressDiagnosticsCallback setting #35852. Assigned to tdykstra.

A new configuration option has been added to the ASP.NET Core exception handler middleware to control diagnostic output: ExceptionHandlerOptions.SuppressDiagnosticsCallback. This callback is passed context about the request and exception, allowing you to add logic that determines whether the middleware should write exception logs and other telemetry.

This setting is useful when you know an exception is transient, or has been handled by the exception handler middleware, and don't want to error logs written to your observability platform.

Additionally, the middleware's default behavior has changed: it no longer writes exception diagnostics for exceptions handled by IExceptionHandler. Based on user feedback, logging handled exceptions at the error level was often undesirable when IExceptionHandler.TryHandleAsync returned true.

You can revert to the previous behavior by configuring SuppressDiagnosticsCallback:

app.UseExceptionHandler(new ExceptionHandlerOptions
{
    SuppressDiagnosticsCallback = context => false;
});

For more information about this breaking change, see aspnet/Announcements#524.

[guardrex]

✔️ Resolved — Blazor NotFound support updates

Tracked by #35861.

[guardrex]

✔️ Resolved — Blazor rename LinkPreload to ResourcePreloader

Tracked by #35745.

[guardrex]

Passkeys coverage

Tracked by #35728.