Typen %1.%2 har markerats för systemdefinierad serialisering, men bastypen %3.%4 har markerats med LayoutKind.Sequential. För systemdefinierad serialisering krävs att typen har markerats med LayoutKind.Sequential.
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English version
Type "%1.%2" is marked for native serialization, but base type "%3.%4" is not marked with "LayoutKind.Sequential". Native serialization requires the type to be marked with "LayoutKind.Sequential".