public static IPagedDataService<Photo> GetGroupPhotosPagedDataService(Group group)
{
var orderBy = new System.Collections.Generic.KeyValuePair<object, Bobs.OrderBy.OrderDirection>
(GroupPhoto.Columns.DateTime, OrderBy.OrderDirection.Descending);
return group.ChildPhotos(new Q(Photo.Columns.IsInCaptionCompetition, false), orderBy);
}