Quantiy SpecificFuelConsumption units symbols contain invalid characters

[josefprinz]

Describe the bug
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To Reproduce
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1. Add nuget UnitsNet 4.9.0 to a .NET 4.0 project
2. Build using Visual Studio 2017 Community v15.9.2
3. See error: "foo"

Expected behavior
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Additional context
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[angularsen]

That is an ancient version, try upgrading the nuget. The latest 4.x is https://www.nuget.org/packages/UnitsNet/4.152.0.

Beyond that, we don't really support older major versions unless there is something very wrong and easy to fix.

The latest major versions are 5.x and pre-release of 6.x.
https://www.nuget.org/packages/UnitsNet/5.57.0
https://www.nuget.org/packages/UnitsNet/6.0.0-pre011

[angularsen]

Also, netstandard2.0 is required for 5.x so it would require minimum .NET 4.6.2.
https://learn.microsoft.com/en-us/dotnet/standard/net-standard?tabs=net-standard-2-0

[github-actions]

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