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Unsafe evolution: avoid checking unreferenced assemblies (#82300)
Unsafe evolution: extend compat mode to legacy callers (#83660)
Unsafe evolution: add `MemorySafetyRules` attribute (#81441)
Closed classes misc changes (#83614)
Extensions: Merge lookup of classic and new extensions (#82165)
Avoid `virtual` implementations for `AddSynthesizedAttributes` (#81289)
Adjust public API based on API review feedback (#71940)