Fix AttributeUsage.AllowMultiple not inherited for C#-defined attributes#19315

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T-Gro merged 2 commits intodotnet:mainfrom

edgarfgp:fix-17107-allowmultiple-inherited-csharp

Apr 14, 2026

Commits on Apr 14, 2026

Fix AttributeUsage.AllowMultiple not inherited for C#-defined attributes (#17107)

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Use O(1) WellKnownILAttributes fast-path for AttributeUsage lookup

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