Add Visual Studio 2026 support to InstallVisualStudio.ps1 #64406

Copilot · 2025-11-17T22:48:11Z

Add Visual Studio 2026 support to InstallVisualStudio.ps1

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Enable VS 2026 installation via build-from-source script

Description

The InstallVisualStudio.ps1 script only supported VS 2022. This adds VS 2026 support following the existing pattern where VS 2022 maps to internal version 17.

Script changes:

Added '2026' to Version parameter ValidateSet
Map VS 2026 → internal version 18
Updated path prefix logic to handle version 18
Updated parameter documentation
Added logic to handle VS 2026's different channel naming convention (stable/insiders instead of release/pre)

Response files:
Created six VS 2026 JSON configuration files (vs.18.*.json) mirroring the VS 2022 structure:

Release, Preview, and IntPreview channels for both full editions and BuildTools
Channel URIs use VS 2026's naming: stable (Release), insiders (Preview), and intpreview (IntPreview)
Channel IDs use VisualStudio.18.{Channel} format
Updated Windows SDK from Windows10SDK.19041 to Windows11SDK.22621 (latest available)

No changes to existing VS 2022 functionality. Backward compatibility maintained.

Original prompt

This section details on the original issue you should resolve

<issue_title>Build from source instructions need to be updated for VS 2026</issue_title>
<issue_description>Instructions here: https://github.com/dotnet/aspnetcore/blob/main/docs/BuildFromSource.md

Specifically, the InstallVisualStudio.ps1 script needs to be updated to support 2026. It only allows VS 2022.</issue_description>

Comments on the Issue (you are @copilot in this section)

Fixes Build from source instructions need to be updated for VS 2026 #64405

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

adityamandaleeka · 2025-11-17T23:17:14Z

@copilot the internal number for VS2026 is 18, not 19.

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

Copilot · 2025-11-17T23:24:07Z

@copilot the internal number for VS2026 is 18, not 19.

Corrected to version 18. Updated the version mapping in InstallVisualStudio.ps1 and renamed all JSON files from vs.19.* to vs.18.* with updated channel URIs and IDs. Commit: 9c0c236

wtgodbe · 2025-11-18T03:02:39Z

eng/scripts/vs.18.buildtools.intpreview.json

+        "Microsoft.VisualStudio.Component.VC.ATL.ARM64",
+        "Microsoft.VisualStudio.Component.VC.Tools.ARM64",
+        "Microsoft.VisualStudio.Component.VC.Tools.x86.x64",
+        "Microsoft.VisualStudio.Component.VC.14.29.16.11.ARM64",


Where did these numbers come from?

I think those are just copied from the v17 one https://github.com/dotnet/aspnetcore/blob/main/eng/scripts/vs.17.intpreview.json

wtgodbe

LGTM if it works locally

adityamandaleeka · 2025-12-04T21:27:52Z

@copilot I tried this out and had to make more changes since the channel names for VS2026 are different (https://learn.microsoft.com/en-us/visualstudio/releases/2026/release-rhythm). I also had to update the Windows SDK version since the old Win10 version we were using is no longer available.

Copilot · 2025-12-04T21:34:29Z

@copilot I tried this out and had to make more changes since the channel names for VS2026 are different (https://learn.microsoft.com/en-us/visualstudio/releases/2026/release-rhythm). I also had to upd...

Understood. I've verified the changes - the VS 2026 channel URIs are now correctly using "stable" and "insiders" instead of "release" and "pre", and the Windows SDK has been updated to Windows11SDK.22621. The implementation looks correct based on the Microsoft documentation.

The Windows 10 SDK 19041 is not available in VS 2026. Update to Windows 11 SDK 22621 which is available in both VS 2022 and VS 2026. - Update Cpp.Common.props WindowsTargetPlatformVersion - Update all vs.17.*.json and vs.18.*.json installer configs

Copilot

Pull request overview

This PR adds Visual Studio 2026 support to the InstallVisualStudio.ps1 build script, enabling developers to install and configure VS 2026 for building ASP.NET Core from source. The implementation follows the existing VS 2022 pattern, mapping VS 2026 to internal version 18 and accommodating VS 2026's updated channel naming conventions (stable/insiders instead of release/pre).

Key changes:

PowerShell script updated to support VS 2026 with proper version mapping and channel URI logic
Six new VS 2026 JSON configuration files created for all edition/channel combinations
Windows SDK upgraded from 10.0.19041.0 to 10.0.22621.0 across all VS configurations
Removed IHttpResponse4 interface definition from C++ code (now provided by upgraded Windows SDK)

Reviewed changes

Copilot reviewed 15 out of 15 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
eng/scripts/InstallVisualStudio.ps1	Added VS 2026 parameter validation, version mapping (2026→18), channel URI logic for stable/insiders naming, and install path handling for VS 2026
eng/scripts/vs.18.json	VS 2026 Release channel configuration with Windows 11 SDK 22621 and v143 toolset components
eng/scripts/vs.18.preview.json	VS 2026 Preview/Insiders channel configuration
eng/scripts/vs.18.intpreview.json	VS 2026 IntPreview channel configuration
eng/scripts/vs.18.buildtools.json	VS 2026 BuildTools Release channel configuration with additional build-specific components
eng/scripts/vs.18.buildtools.preview.json	VS 2026 BuildTools Preview/Insiders channel configuration
eng/scripts/vs.18.buildtools.intpreview.json	VS 2026 BuildTools IntPreview channel configuration
eng/scripts/vs.17.json	Updated Windows SDK from 10.0.19041 to 10.0.22621 for VS 2022 Release
eng/scripts/vs.17.preview.json	Updated Windows SDK from 10.0.19041 to 10.0.22621 for VS 2022 Preview
eng/scripts/vs.17.intpreview.json	Updated Windows SDK from 10.0.19041 to 10.0.22621 for VS 2022 IntPreview
eng/scripts/vs.17.buildtools.json	Updated Windows SDK from 10.0.19041 to 10.0.22621 for VS 2022 BuildTools Release
eng/scripts/vs.17.buildtools.preview.json	Updated Windows SDK from 10.0.19041 to 10.0.22621 for VS 2022 BuildTools Preview
eng/scripts/vs.17.buildtools.intpreview.json	Updated Windows SDK from 10.0.19041 to 10.0.22621 for VS 2022 BuildTools IntPreview
eng/targets/Cpp.Common.props	Updated WindowsTargetPlatformVersion to 10.0.22621.0 and generalized comment to reference all VS version JSON files
src/Servers/IIS/AspNetCoreModuleV2/InProcessRequestHandler/managedexports.cpp	Removed local IHttpResponse4 interface definition (now provided by Windows SDK 22621)

eng/scripts/InstallVisualStudio.ps1

Initial plan

3c139fe

Copilot AI assigned Copilot and adityamandaleeka Nov 17, 2025

dotnet-policy-service bot added the Attention: Shared Code Modified label Nov 17, 2025

Copilot started work on behalf of adityamandaleeka November 17, 2025 22:48 View session

Add VS 2026 support to InstallVisualStudio.ps1

c84b677

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

Copilot AI changed the title ~~[WIP] Update build from source instructions for Visual Studio 2026~~ Add Visual Studio 2026 support to InstallVisualStudio.ps1 Nov 17, 2025

Copilot AI requested a review from adityamandaleeka November 17, 2025 23:03

Copilot finished work on behalf of adityamandaleeka November 17, 2025 23:03

Copilot started work on behalf of adityamandaleeka November 17, 2025 23:17 View session

Fix VS 2026 internal version number to 18

9c0c236

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

Copilot finished work on behalf of adityamandaleeka November 17, 2025 23:26

This was referenced Nov 18, 2025

The Operation will be canceled. The next steps may not contain expected logs. dotnet/dnceng#3008

Open

[android-arm64] The Operation will be canceled. The next steps may not contain expected logs. dotnet/dnceng#6408

Open

wtgodbe reviewed Nov 18, 2025

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wtgodbe approved these changes Nov 19, 2025

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ladeak approved these changes Nov 24, 2025

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adityamandaleeka added 3 commits December 4, 2025 13:13

Update channel names for 2026.

2e99d8c

More updating of channel names.

83951b2

Update to available Win11 SDK.

7a9000c

Copilot started work on behalf of adityamandaleeka December 4, 2025 21:28 View session

Copilot finished work on behalf of adityamandaleeka December 4, 2025 21:37

adityamandaleeka added 4 commits December 4, 2025 14:04

Add v143 toolset to Dev18 components.

482d06e

Update VCTools to v143.

e08e786

Avoid double definition of IHttpResponse4.

a504f47

adityamandaleeka added 2 commits December 4, 2025 16:33

Remove interface definition entirely.

d3cfd61

Accept Stable and Insiders as channel name aliases.

3681b4f

adityamandaleeka marked this pull request as ready for review December 5, 2025 00:52

Copilot AI review requested due to automatic review settings December 5, 2025 00:52

adityamandaleeka requested review from a team, BrennanConroy, JamesNK and halter73 as code owners December 5, 2025 00:52

Copilot started reviewing on behalf of adityamandaleeka December 5, 2025 00:52 View session

Copilot finished reviewing on behalf of adityamandaleeka December 5, 2025 01:05

Copilot AI reviewed Dec 5, 2025

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build-analysis bot mentioned this pull request Dec 5, 2025

Known Build Error: error : Cannot create a file when that file already exists. #61178

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Add Visual Studio 2026 support to InstallVisualStudio.ps1 #64406

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Add Visual Studio 2026 support to InstallVisualStudio.ps1

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