private void FixupGenre(Genre previousValue)
     {
         if (previousValue != null && previousValue.Tracks.Contains(this))
         {
             previousValue.Tracks.Remove(this);
         }
 
         if (Genre != null)
         {
             if (!Genre.Tracks.Contains(this))
             {
                 Genre.Tracks.Add(this);
             }
             if (GenreId != Genre.GenreId)
             {
                 GenreId = Genre.GenreId;
             }
         }
         else if (!_settingFK)
         {
             GenreId = null;
         }
     }