public AtomServiceDocument Description
{
    get
    {
        var names = new
        {
            Articles = this.GetArticleCollectionName(),
            Images = this.GetImageCollectionName(),
            Media = this.GetMediaWorkspaceName()
        };

        RequestHelper request = new RequestHelper(this);
        AtomServiceDocument description = new AtomServiceDocument();
        WCF.ReferencedCategoriesDocument categories = new WCF.ReferencedCategoriesDocument(request.GetWorkspaceUri("Categories"));
        foreach (string name in this.Catalog.Workspaces.Select(w => w.Name).ToList())
        {
            WCF.Workspace workspace = new WCF.Workspace
            {
                Title = WCF.TextSyndicationContent.CreatePlaintextContent(name),
                BaseUri = request.GetWorkspaceUri(name)
            };

            WCF.ResourceCollectionInfo collection = new WCF.ResourceCollectionInfo(names.Articles, request.GetCollectionUri(name, names.Articles));
            collection.Accepts.Add(ContentTypes.AtomEntry);
            collection.Categories.Add(categories);

            workspace.Collections.Add(collection);
            description.Workspaces.Add(workspace);
        }

        WCF.Workspace media = description.Workspaces.SingleOrDefault(w => w.Title.Text == names.Media);
        if (null == media)
        {
            media = new WCF.Workspace
            {
                Title = WCF.TextSyndicationContent.CreatePlaintextContent(names.Media),
                BaseUri = request.GetWorkspaceUri(names.Media)
            };

            description.Workspaces.Add(media);
        }

        media.Collections.Add(new WCF.ResourceCollectionInfo(names.Images, request.GetCollectionUri(names.Media, names.Images))
        {
            Accepts = { ContentTypes.ImageGroup }
        });

        this.Context.SetResponseContentType(ContentTypes.AtomServiceDocument);
        return description;
    }
}