### Summary of the changes

-

Fixes:

…130.4

On relative base path root
Microsoft.DotNet.Arcade.Sdk From Version 10.0.0-beta.26066.3 -> To Version 10.0.0-beta.26080.4

Co-authored-by: davidwengier <754264+davidwengier@users.noreply.github.com>

This pull request updates the following dependencies

[marker]: <> (Begin:2907dbca-fa2e-42bc-f7dd-08dc0c5b4e6d)
## From https://github.com/dotnet/arcade
- **Subscription**:
[2907dbca-fa2e-42bc-f7dd-08dc0c5b4e6d](https://maestro.dot.net/subscriptions?search=2907dbca-fa2e-42bc-f7dd-08dc0c5b4e6d)
- **Build**:
[20260130.4](https://dev.azure.com/dnceng/internal/_build/results?buildId=2891960)
([299615](https://maestro.dot.net/channel/8394/github:dotnet:arcade/build/299615))
- **Date Produced**: January 31, 2026 3:24:21 AM UTC
- **Commit**:
[b0f891cf7c1febc0ebbae7dd787f8a0b4c0cbc95](dotnet/arcade@b0f891c)
- **Branch**:
[release/10.0](https://github.com/dotnet/arcade/tree/release/10.0)

[DependencyUpdate]: <> (Begin)

- **Dependency Updates**:
  - From [10.0.0-beta.26066.3 to 10.0.0-beta.26080.4][1]
     - Microsoft.DotNet.Arcade.Sdk

[1]: dotnet/arcade@af17297...b0f891c

[DependencyUpdate]: <> (End)


[marker]: <> (End:2907dbca-fa2e-42bc-f7dd-08dc0c5b4e6d)

Changed from html.autoClosingTags to html.auto_closing_tags to match VS Code's
snake_case naming convention. Added comment explaining the naming pattern for
future setting additions.

Co-authored-by: davidwengier <754264+davidwengier@users.noreply.github.com>

Responding to changes in Roslyn in dotnet/roslyn#81993

…ing VS Code

…12735)

### Summary of the changes

VS Code Cohosting mode ignores the `html.autoClosingTags` setting,
preventing users from disabling auto-closing tags.

`CohostConfigurationChangedService` fetches Razor-specific settings but
was missing `html.autoClosingTags`. Added it to the configuration items
list using the correct snake_case naming convention
(`html.auto_closing_tags`) to match VS Code's setting format. Updated
the settings parser to map the value and includes `TryGetElement` helper
for safe array access to maintain backward compatibility with existing
clients.

Added explanatory comment about VS Code's snake_case naming convention
to help future developers understand the naming pattern when adding new
settings.

Fixes this specific comment:
dotnet#9658 (comment)

Fixes dotnet#12807

The basic problem is we were emitting expressions by themselves, but
ternaries apparently prefer to parse as labels when they're on their
own. Emiting `_ =` before them lets Roslyn know its an expression.

Probably should have been this way from the start.

Fixes dotnet#9655

Fixes dotnet#12805

The paste here leaves the document with multiple syntax errors which the
Razor parser doesn't do a great job with (Html document ends up with
close braces, C# document ends up with div tags) which makes formatting
throw up. We already have code that skips range formatting if there are
Razor diagnostics, but in this case there are only C# diagnostics, and
it's too expensive to query them, especially during typing.

* Initial plan

* Fix @@ escape handling in component attribute values

The issue was that @@ escape sequences were being parsed correctly
but then treated as "complex content" during code generation, causing
them to fail when used in component attributes.

The fix modifies the VisitAttributeValue method to extract the literal
@ token from the escaped @@ pattern and merge it with the rest of the
attribute value as a simple string, rather than creating separate HTML
content nodes.

This allows component attributes to accept literal @ characters using
the @@ escape syntax, e.g. <Weather Value="@@currentCount" /> now
correctly passes the string "@currentCount" to the component.

Co-authored-by: chsienki <16246502+chsienki@users.noreply.github.com>

* Update test baselines after @@ escape fix

The fix for @@ escape handling changed how source positions are
tracked for escaped @ tokens in attribute values. The ComplexTagHelpers
test baselines needed to be updated to reflect the new positions.

Co-authored-by: chsienki <16246502+chsienki@users.noreply.github.com>

* Address code review feedback - formatting improvements

Co-authored-by: chsienki <16246502+chsienki@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: chsienki <16246502+chsienki@users.noreply.github.com>

Fixes https://devdiv.visualstudio.com/DevDiv/_workitems/edit/2692923

…ase/insiders is entirely discarded

Co-authored-by: David Wengier <david.wengier@microsoft.com>

* Update dependencies from https://github.com/dotnet/arcade build 20260223.2
On relative base path root
Microsoft.DotNet.Arcade.Sdk From Version 10.0.0-beta.26110.1 -> To Version 10.0.0-beta.26123.2

* update package versions

* Update dependencies from https://github.com/dotnet/arcade build 20260302.1
On relative base path root
Microsoft.DotNet.Arcade.Sdk From Version 10.0.0-beta.26110.1 -> To Version 10.0.0-beta.26152.1

* Update dependencies from https://github.com/dotnet/arcade build 20260303.3
On relative base path root
Microsoft.DotNet.Arcade.Sdk From Version 10.0.0-beta.26110.1 -> To Version 10.0.0-beta.26153.3

* Update dependencies from https://github.com/dotnet/arcade build 20260309.1
On relative base path root
Microsoft.DotNet.Arcade.Sdk From Version 10.0.0-beta.26110.1 -> To Version 10.0.0-beta.26159.1

* Fixup versions

---------

Co-authored-by: dotnet-maestro[bot] <dotnet-maestro[bot]@users.noreply.github.com>
Co-authored-by: Ankita Khera <ankitakhera@microsoft.com>
Co-authored-by: Jan Jones <janjones@microsoft.com>

…310.1 (dotnet#12889)

[release/insiders] Update dependencies from dotnet/arcade

…314.1 (dotnet#12900)

[release/insiders] Update dependencies from dotnet/arcade

…318.1 (dotnet#12925)

[release/insiders] Update dependencies from dotnet/arcade

…327.7 (dotnet#12967)

[release/insiders] Update dependencies from dotnet/arcade