Request to Update Target Framework for Microsoft.Extensions.AI.Abstractions

[cloudsere]

Description

Hi Team,

We noticed that the latest release of Microsoft.Extensions.AI.Abstractions targets .NET Framework 4.6.2. However, .NET Framework 4.6.2 will reach end of support on January 12, 2027. https://learn.microsoft.com/en-us/lifecycle/products/microsoft-net-framework

Our project uses .NET Framework 4.7.2, which has long-term support, but we are currently blocked from using this package due to the lack of target platform support for .NET Framework 4.7.2.

Could you please update the target framework to .NET Framework 4.7.2 in future releases to ensure compatibility with our project and other similar scenarios?

Thank you for your consideration!

Reproduction Steps

Add Microsoft.Extensions.AI.Abstractions to a .NET Framework 4.7.2 project

Expected behavior

Microsoft.Extensions.AI.Abstractions targets .NET Framework 4.7.2

Actual behavior

Regression?

No response

Known Workarounds

No response

Configuration

No response

Other information

No response

[huoyaoyuan]

Our project uses .NET Framework 4.7.2, which has long-term support, but we are currently blocked from using this package due to the lack of target platform support for .NET Framework 4.7.2.

Could you please update the target framework to .NET Framework 4.7.2 in future releases to ensure compatibility with our project and other similar scenarios?

It isn't needed. Any package supporting .NET Framework 4.6.2 is supporting .NET Framework 4.7.2.

The warning message means you aren't targeting .NET Framework 4.7.2 in your project, but other .NET Standard compatible frameworks. I can't reproduce it on a fresh .NET Framework 4.7.2 project.

[huoyaoyuan]

The package lives in https://github.com/dotnet/extensions , though it can also be helpful to discuss in this repo. You can navigate with "Source repository" link on nuget.org.

[cloudsere]

Hi @huoyaoyuan thanks for sharing, but this is our error: Microsoft.Extensions.AI.Abstractions 9.0.0-preview.9.24525.1 doesn't support net472 and has not been tested with it. Consider upgrading your TargetFramework to net8.0 or later. wondering do you know the reason?

[huoyaoyuan]

It's better to collect msbuild binlog to see what happens. Note that it would contain information about your project and source code.
Are you using the old .NET Framework project, or new SDK-style project?

[cloudsere]

Hi @huoyaoyuan, we are using the old .NET Framework project:

<?xml version="1.0" encoding="utf-8"?>
<Project DefaultTargets="Build" ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
  <Import Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" />
  <PropertyGroup>
    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
    <AppDesignerFolder>Properties</AppDesignerFolder>
    <TargetFrameworkVersion>v4.7.2</TargetFrameworkVersion>
    <FileAlignment>512</FileAlignment>
    <IsWebBootstrapper>false</IsWebBootstrapper>
    <EnableNETAnalyzers>true</EnableNETAnalyzers>
    <AutoGenerateBindingRedirects>true</AutoGenerateBindingRedirects>
  </PropertyGroup>

[huoyaoyuan]

It looks strange. Looking through the package content of Microsoft.Extensions.AI.Abstractions, it doesn't contain msbuild targets for the target framework validation logic. Can you confirm which .targets file the warning comes from?

[cloudsere]

Hi @huoyaoyuan, the .targets file is

139>...\.nuget\packages\microsoft.extensions.ai.abstractions\9.0.0-preview.9.24525.1\buildTransitive\net462\Microsoft.Extensions.AI.Abstractions.targets(5,5): warning : Microsoft.Extensions.AI.Abstractions 9.0.0-preview.9.24525.1 doesn't support net472 and has not been tested with it. Consider upgrading your TargetFramework to net8.0 or later. You may also set <SuppressTfmSupportBuildWarnings>true</SuppressTfmSupportBuildWarnings> in the project file to ignore this warning and attempt to run in this unsupported configuration at your own risk.

[cloudsere]

The package lives in https://github.com/dotnet/extensions , though it can also be helpful to discuss in this repo. You can navigate with "Source repository" link on nuget.org.

Yes, I actually came from the 'Source repository' link. However, when I created the issue, I selected 'Issue with .NET runtime or core .NET libraries,' which redirected me here. I can move the issue to the https://github.com/dotnet/extensions repo though:)

[huoyaoyuan]

OK I looked closely into the version. The warning was present in the previous version 9.0.0-preview9.24525.1. The warning unconditionally applied to any .NET Framework version, including .NET Framework 4.6.2. It's now removed from the latest version 9.0.0-preview.9.24556.5.

However, when I created the issue, I selected 'Issue with .NET runtime or core .NET libraries,' which redirected me here.

"Core" means libraries under System namespace and a portion of Microsoft.Extensions that has been ported here.