Type "%1!s!.%2!s!" is marked for native serialization, but field "%3!s!" of type "%4!s!.%5!s!" is marked with "System.NonSerializedAttribute". ...

Type "%1!s!.%2!s!" is marked for native serialization, but field "%3!s!" of type "%4!s!.%5!s!" is marked with "System.NonSerializedAttribute". Native serialization types cannot have fields marked with "System.NonSerializedAttribute".