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Merged
merged 6 commits into from
Aug 25, 2025
Merged

Allow Razor cohosting to work with non-Razor SDK projects #8559

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f96d8d8
Pass C# design time targets path to build
davidwengier Aug 19, 2025
f1ee78d
Reference Razor design time targets from the extension if cohosting i…
davidwengier Aug 19, 2025
1f2e475
Merge remote-tracking branch 'upstream/main' into RazorWithNonRazorSd…
davidwengier Aug 25, 2025
b6cdecf
Bump Razor to 10.0.0-preview.25424.9
davidwengier Aug 25, 2025
8a4c29d
Bump Roslyn to 5.0.0-2.25424.1
davidwengier Aug 25, 2025
6eee942
Update CHANGELOG.md
davidwengier Aug 25, 2025
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10 changes: 9 additions & 1 deletion CHANGELOG.md
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Expand Up @@ -4,7 +4,15 @@
- Debug from .csproj and .sln [#5876](https://github.com/dotnet/vscode-csharp/issues/5876)

# 2.90.x
* Bump Razor to 10.0.0-preview.25416.1 (PR: [#8557](https://github.com/dotnet/vscode-csharp/pull/8557))
* Bump Roslyn to 5.0.0-2.25424.1 (PR: [#8559](https://github.com/dotnet/vscode-csharp/pull/8559))
* Generate `init` accessor for required properties inside `readonly struct`s (PR: [#80004](https://github.com/dotnet/roslyn/pull/80004))
* Allow Razor cohosting to work with non-Razor SDK projects (PR: [#79953](https://github.com/dotnet/roslyn/pull/79953))
* Update 'use expr body' to be a purely syntactic analyzer (PR: [#79979](https://github.com/dotnet/roslyn/pull/79979))
* Implement "Simplify property accessor" feature (PR: [#79754](https://github.com/dotnet/roslyn/pull/79754))
* Allow Razor to hook up the source generator in misc files (PR: [#79891](https://github.com/dotnet/roslyn/pull/79891))
* Bump Razor to 10.0.0-preview.25424.9 (PR: [#8559](https://github.com/dotnet/vscode-csharp/pull/8559))
* Allow Razor cohosting to work with non-Razor SDK projects (PR: [#12118](https://github.com/dotnet/razor/pull/12118))
* Allow the source generator to produce results for miscellaneous files (PR: [#12106](https://github.com/dotnet/razor/pull/12106))
* Fix range formatting in the presence of K&R braces (PR: [#12121](https://github.com/dotnet/razor/pull/12121))
* Add codelens endpoints and services for cohosting (PR: [#12078](https://github.com/dotnet/razor/pull/12078))
* Support Go To Def for Mvc tag helpers in cohosting (PR: [#12102](https://github.com/dotnet/razor/pull/12102))
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6 changes: 3 additions & 3 deletions package.json
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Expand Up @@ -40,9 +40,9 @@
"workspace"
],
"defaults": {
"roslyn": "5.0.0-2.25412.5",
"omniSharp": "1.39.14",
"razor": "10.0.0-preview.25419.3",
"roslyn": "5.0.0-2.25424.1",
"omniSharp": "1.39.14",
"razor": "10.0.0-preview.25424.9",
"razorOmnisharp": "7.0.0-preview.23363.1",
"xamlTools": "17.14.36106.43"
},
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11 changes: 10 additions & 1 deletion src/lsptoolshost/server/roslynLanguageServer.ts
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Expand Up @@ -666,7 +666,7 @@ export class RoslynLanguageServer {

args.push(
'--razorDesignTimePath',
path.join(razorPath, 'Targets', 'Microsoft.NET.Sdk.Razor.DesignTime.targets')
path.join(razorSourceGeneratorPath, 'Targets', 'Microsoft.NET.Sdk.Razor.DesignTime.targets')
);

// Get the brokered service pipe name from C# Dev Kit (if installed).
Expand Down Expand Up @@ -706,6 +706,15 @@ export class RoslynLanguageServer {
// Set command enablement to use roslyn standalone commands.
await vscode.commands.executeCommand('setContext', 'dotnet.server.activationContext', 'Roslyn');
_wasActivatedWithCSharpDevkit = false;

if (razorOptions.cohostingEnabled) {
// Razor has code in Microsoft.CSharp.DesignTime.targets to handle non-Razor-SDK projects, but that doesn't get imported outside
// of DevKit so we polyfill with a mini-version that Razor provides for that scenario.
Comment on lines +711 to +712
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@jasonmalinowski jasonmalinowski Aug 21, 2025

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Why aren't we importing the same support directly?

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@davidwengier davidwengier Aug 21, 2025

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In DevKit the targets file comes from the Microsoft.VisualStudio.ProjectSystem.Managed package which we don't reference in the C# extension. Seemed like a large hammer for one xml file. We'd still need all of the changes in this PR anyway, to pass the path through to msbuild etc. it would just be path itself that would change.

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@dibarbet dibarbet Aug 21, 2025

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I presume we also need this for C# standalone scenarios, when devkit isn't available?

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@davidwengier davidwengier Aug 21, 2025

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Yeah, thats the only scenario this code runs in. With DevKit, we leave it up to it.

args.push(
'--csharpDesignTimePath',
path.join(razorComponentPath, 'Targets', 'Microsoft.CSharpExtension.DesignTime.targets')
);
}
}

for (const extensionPath of additionalExtensionPaths) {
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