[release/10.0] Fix nullable complex property discriminator changes not persisted#38134

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AndriySvyryd merged 6 commits intorelease/10.0from

copilot/fix-nullable-complex-property-discriminator

Apr 20, 2026

Commits on Apr 17, 2026

Initial plan
Copilot
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Fix nullable complex property discriminator changes not being recognized (#38119)

Copilot
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AndriySvyryd
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Move UseOldBehavior38119 field declaration before method that uses it

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AndriySvyryd
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Address review: remove duplicate quirk field from ChangeDetector, use InternalComplexTypeBuilder.UseOldBehavior38119; fix comment

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AndriySvyryd
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Apply suggestions from code review

AndriySvyryd
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Copilot
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Guard discriminator with IsShadowProperty when null; add Update, explicit discriminator value, and null discriminator tests

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AndriySvyryd
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