[c-sharp] Why does Oneof not generate inheritance-code alike the Java generated code?

When using oneOf in an OpenAPI Spec, e.g.

components:
  schemas:
    EventDto:
      type: object
      properties:
        data:
          oneOf:
            - $ref: '#/components/schemas/Quote'
            - $ref: '#/components/schemas/Offer'
      description: CloudEvent for Quote
    QuoteDto:
      type: object
      properties:
        quoteId:
          type: string
    OfferDto:
      type: object
      properties:
        offerId:
          type: string

The Java Code generator generates an interface OneOfEventDtoData and QuoteDto and OfferDto inherit from OneOfEventDtoData. Makes sense.

Why does c-sharp not generate similar code? There is no inheritance between the partial class OneOfEventDtoData and the QuoteDto and OfferDto classes

Start with the OpenAPI oneOf example in the issue and compare the Java generator's output with the C# generator's output for EventDto, QuoteDto, and OfferDto. Trace the C# generator entry point for model generation and determine what tests cover oneOf schemas; done means the generated C# types provide the requested relationship without breaking existing output.