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Update compatibility message for targeting .NET 10.0 in Visual Studio 18.0 #50749

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Update compatibility message for targeting .NET 10.0 in Visual Studio 18.0 #50749

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237357f
Initial plan
Copilot Sep 11, 2025
bd1ca9b
Update compatibility message for trying to target net10.0 in VS 17.14
Copilot Sep 11, 2025
ab74179
Update .NET 10.0 compatibility warning to require VS 18.0
Copilot Sep 11, 2025
b05f036
Move the latest message to the end of the file so it'll trigger merge…
marcpopMSFT Sep 15, 2025
f6c878c
Update helix test queues to use VS 2026 images
Copilot Oct 17, 2025
99c06be
Update NETSDK error code from 1229 to 1233 to resolve merge conflict
Copilot Oct 17, 2025
8ab9f6c
Merge branch 'main' into copilot/fix-50748
marcpopMSFT Oct 17, 2025
3e05870
Remove unused Net9NotCompatibleWithDev1711 resource
Copilot Oct 19, 2025
37dc93a
Skip AOT tests failing on VS 2026 image
Copilot Oct 20, 2025
860bf5c
Update tests for VS 18 compatibility and NETSDK1223 removal
Copilot Oct 20, 2025
97ae8c4
Revert RulesMissingDocumentation.md and fix 4.6.2 test parameters
Copilot Oct 20, 2025
28d3a8a
Move to earlier than 17.15
marcpopMSFT Oct 20, 2025
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2 changes: 1 addition & 1 deletion .vsts-ci.yml
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Expand Up @@ -98,7 +98,7 @@ extends:
name: $(DncEngInternalBuildPool)
image: windows.vs2022.amd64
os: windows
helixTargetQueue: windows.amd64.vs2022.pre
helixTargetQueue: windows.amd64.vs2026.pre.scout
oneESCompat:
templateFolderName: templates-official
publishTaskPrefix: 1ES.
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2 changes: 1 addition & 1 deletion .vsts-pr.yml
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Expand Up @@ -42,7 +42,7 @@ stages:
name: $(DncEngPublicBuildPool)
demands: ImageOverride -equals windows.vs2022.amd64.open
os: windows
helixTargetQueue: windows.amd64.vs2022.pre.open
helixTargetQueue: windows.amd64.vs2026.pre.scout.open

############### LINUX ###############
- template: /eng/pipelines/templates/jobs/sdk-job-matrix.yml
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6 changes: 5 additions & 1 deletion src/Tasks/Common/Resources/Strings.resx
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Expand Up @@ -1010,5 +1010,9 @@ You may need to build the project on another operating system or architecture, o
<value>NETSDK1232: Unable to find a matching RID for '{0}' from among [{1}] in graph '{2}'.</value>
<comment>{StrBegins="NETSDK1232: "}{Locked="{0}"}{Locked="{1}"}{Locked="{2}"}</comment>
</data>
<!-- The latest message added is UnableToFindMatchingRid. Please update this value with each PR to catch parallel PRs both adding a new message -->
<data name="Net10NotCompatibleWithVS17" xml:space="preserve">
<value>NETSDK1233: Targeting .NET 10.0 or higher in Visual Studio 2022 17.14 is not supported.</value>
<comment>{StrBegins="NETSDK1233: "}</comment>
</data>
<!-- The latest message added is Net10NotCompatibleWithVS17. Please update this value with each PR to catch parallel PRs both adding a new message -->
</root>
5 changes: 5 additions & 0 deletions src/Tasks/Common/Resources/xlf/Strings.cs.xlf
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5 changes: 5 additions & 0 deletions src/Tasks/Common/Resources/xlf/Strings.zh-Hant.xlf
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6 changes: 3 additions & 3 deletions src/Tasks/Microsoft.NET.Build.Tasks/targets/Microsoft.NET.Sdk.DefaultItems.targets
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Expand Up @@ -138,10 +138,10 @@ Copyright (c) .NET Foundation. All rights reserved.
FormatArguments="$(SdkResolverGlobalJsonPath)" />
</Target>

<Target Name="_WarnWhenUsingNET9AndVSPriorTo1712"
<Target Name="_WarnWhenUsingNET10AndVSPriorTo18"
BeforeTargets="_CheckForInvalidConfigurationAndPlatform"
Condition="$([MSBuild]::VersionLessThan($(MSBuildVersion), '17.12.0')) and '$(TargetFrameworkIdentifier)' == '.NETCoreApp' and $([MSBuild]::VersionGreaterThanOrEquals($(_TargetFrameworkVersionWithoutV), '9.0'))">
<NetSdkWarning ResourceName="Net9NotCompatibleWithDev1711"/>
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Should Net9NotCompatibleWithDev1711 resource be deleted from resx?

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@copilot Net9NotCompatibleWithDev1711 is not longer used so please remove it

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Removed the unused Net9NotCompatibleWithDev1711 resource from Strings.resx and all localization files. Changes committed in the commit shown above.

Condition="$([MSBuild]::VersionLessThan($(MSBuildVersion), '18.0.0')) and '$(TargetFrameworkIdentifier)' == '.NETCoreApp' and $([MSBuild]::VersionGreaterThanOrEquals($(_TargetFrameworkVersionWithoutV), '10.0'))">
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Is it intentional that we are checking TargetFramework here?

Issues happen whenever MSBuild 17 is used with .NET 10 SDK regardless of the TFM being targeted (unless we are talking about different issues here)

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According to @marcpopMSFT in #50748:

Using the 10.0.1xx SDK to target net10.0 is not supported unless you're using VS 18.0.0.

Targeting net10 will require VS 2026 as there are matching IDE side changes.

(emphasis mine)

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Issues happen whenever MSBuild 17 is used with .NET 10 SDK

Which issues?
See also dotnet/core#10081 where many users asked about what actually works and doesn't work in .NET 10 (SDK or targeting) when used in VS 2022. This should really be documented somewhere...

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dotnet/msbuild#12669

<NetSdkWarning ResourceName="Net10NotCompatibleWithVS17"/>
</Target>

<Target Name="_CheckForInvalidWindowsDesktopTargetingConfiguration"
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