Warning emitted when targeting net7.0

Article
11/12/2024

Starting with the November 2024 releases of the .NET 8 and 9 SDKs, warning NETSDK1138 is issued if your app targets net7.0. .NET 7 is now out of support.

When a version of .NET goes out of support, it's marked as such in Visual Studio the following month. The .NET SDK waits 6 months before adding a warning.

This change applies to .NET 8.0.111, 8.0.307, 8.0.404, and 9.0.100.

Version introduced

.NET 9 GA

Previous behavior

Previously, apps could target net7.0 without a warning, even though it was out of support.

New behavior

Starting in .NET 9 and the other affected versions, the following warning is issued at compile time for apps that target net7.0:

warning NETSDK1138: The target framework 'net7.0' is out of support

Type of breaking change

This change can affect source compatibility.

Reason for change

This is a planned change to ensure that customers are aware that they're targeting an unsupported framework version.

Recommended action

Upgrade your app to target net8.0.

If you must continue targeting net7.0, you can set the MSBuild property CheckEolTargetFramework to false. You can set it in the project file or by passing /p:CheckEolTargetFramework=false to a .NET CLI command such as dotnet build.

Example .csproj or .vbproj file:

<Project Sdk="Microsoft.NET.Sdk">
  <PropertyGroup>
    ...
    <CheckEolTargetFramework>false</CheckEolTargetFramework>
  </PropertyGroup>
</Project>

Affected APIs

None.

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