NETSDK1013 when mixing TargetFramework and TargetFrameworks with GeneratePackageOnBuild

[adc-wnorvelle]

Error

C:\Program Files\dotnet\sdk\10.0.101\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.TargetFrameworkInference.targets(109,5): error NETSDK1013: The TargetFramework value '' was not recognized. It may be misspelled. If not, then the TargetFrameworkIdentifier and/or TargetFrameworkVersion properties must be specified explicitly.

In larger solutions, this also generates:
The "MSBuild" task returned false but did not log an error

Trigger Conditions

• Project 1 depends on Project 2
• Project 1 sets TargetFrameworks (actual number of frameworks does not matter)
• Project 1 sets GeneratePackageOnBuild to true
• Project 2 sets TargetFramework
• Both projects use Nerdbank.GitVersioning
• Build in Visual Studio

Reproduction Repository

multitfm-NETSDK1013-Nerdbank.GitVersioning-repro

Environment

• Nerdbank.GitVersioning version: 3.9.50 (also affects 3.10.8-alpha)
• .NET SDK: 10.0.101
• IDE: Verified in Visual Studio 2022 & Visual Studio 2026
• OS: Windows