<PackageReference Include="System.Text.Json" Version="10.0.0-rc.1.25451.107" />

PolymorphicSerializationState

namespace System.Text.Json { internal enum PolymorphicSerializationState : byte { None, PolymorphicReEntryStarted, PolymorphicReEntrySuspended, PolymorphicReEntryNotFound } }