Use the polyfilled generic `Enum.IsDefined()` on .NET Framework and manually replace missed `ArgumentNullException.ThrowIfNull()` guards#2408

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kevinchalet merged 1 commit intoopeniddict:devfrom

kevinchalet:enum_isdefined

Dec 28, 2025

Commits on Dec 28, 2025

Use the polyfilled generic Enum.IsDefined() on .NET Framework and manually replace missed ArgumentNullException.ThrowIfNull() guards
kevinchalet
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