I am working with a Swagger API documentation and want to have my description of the enums in the documentation. I am using a custom filter to extract information from classes and enums, using annotations.
e.g.:

    using System.ComponentModel;
    ...
    [DisplayName("Upload class")]            // Works fine
    public class Upload
    {
        [DisplayName("Primary Key")]          // Works fine
        public int UploadMetaId { get; set; }
        [Display(Name = "document name")]     // Works fine too
        public string Title { get; set; }
    }

But I have problems with my Enums:

[DisplayName("Document types")]    // Illegal, gives error CS0592
// or
[Display(Name = "Document types")]  // Illegal too, gives also CS0592
public enum UploadType
{
    [Display(Name = "Årsopgørelse")] // Works fine
    PartnerAarsopgoerelse = 1,
    [Display(Name = "Ægtefælles årsopgørelse")]
    AegtefaelleAarsopgoerelse = 2
}

The error CS0592 says it’s not valid on this declaration type.

So what can I use instead?