IReturnVoid generates exception on metadata page

问题

The following DTO generates a NullReferenceException when I click on the JSON link on the metadata page.

[DataContract]
[Route("/AVideo")]
[Route("/AVideo/{VideoID}/{Filename}")]
public class PlayerVideo : IReturnVoid
{
   [DataMember]
   public Guid VideoID { get; set; }
   [DataMember]
   public string Filename { get; set; }  //dummy
}

If I change the return type to IReturn<int>, the metadata page generates correctly.

回答1:

Looks like there's a pull request to fix this.

来源：https://stackoverflow.com/questions/17931815/ireturnvoid-generates-exception-on-metadata-page