Remove DOTNET_ROLL_FORWARD environment variable from .NET 10 and 11 SDK images#7256
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Extend EnvironmentVariableInfo with a symmetric Require/Forbid factory API so tests can assert that a variable must be set or must not be set. Use it to verify SDK images do not define DOTNET_ROLL_FORWARD, which currently fails for .NET 10 and 11 images. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
The SDK images set DOTNET_ROLL_FORWARD=Major globally as a temporary workaround for PowerShell/PowerShell#20685, until PowerShell shipped on the .NET 10 runtime. It was unintentionally left in. Because the variable is global, it affects unrelated workloads such as dotnet test, silently rolling older-TFM assemblies forward onto the newer installed runtime and masking compatibility failures. Remove the workaround from the SDK env template and regenerate the .NET 10 and .NET 11 SDK Dockerfiles and approved baselines. Fixes #7255 Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
lbussell
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Jun 23, 2026
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This PR fixes #7255.