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Refactoring of extension methods in source packages (#78620) - take 2 (#78894)
Fix up all the test project launchSettings.json to allow F5 again
Fix handling of SymbolDisplayCompilerInternalOptions.UseArityForGenericTypes option for non-native symbol implementations (#80826)
Set IsClosedTypeAttribute.DerivedTypes (#84350)
Revert "Revert "Implement GetTypesByMetadataName (#58366)" (#58784)" (#58813)
update headers
Update to net9.0 (#75465)
Record anonymous type dependencies during initial binding (#81024)