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I need to retrieve a set of Widgets from my data access layer, grouped by widget.Manufacturer, to display in a set of nested ASP.NET ListViews. The problem is that (as far as I can tell) the nested ListView approach requires me to shape the data before using it, and I can't figure out the best approach to take. The best I've been able to come up with so far is to put a LINQ query in my data access layer like so: var result = from widget in GetAllWidgets(int widgetTypeID) group widget by widget.Manufacturer into groupedWidgets let widgets = from widgetGroup in groupedWidgets select widgetGroup select new { Manufacturer = groupedWidgets.Key, Widgets = widgets }; Of course, anonymous types can't be passed around, so that doesn't work. Defining a custom class to enclose data seems like the wrong way to go. Is there some way I can perform the grouping on the ASP.NET side of things? I'm using ObjectDataSources to access the DAL. Updated : OK, I'm not creating an anonymous type anymore, and instead my DAL passes an IEnumerable<IGrouping<Manufacturer, Widget>> to the ASP.NET page, but how can I use this in my ListViews? I need to render the following HTML (or something pretty much like it) <ul> <li>Foo Corp. <ol> <li>Baz</li> <li>Quux</li> </ol> </li> <li>Bar Corp. <ol> <li>Thinger</li> <li>Whatsit</li> </ol> </li> </ul> Originally, I had a ListView within a ListView like so: <asp:ListView ID="ManufacturerListView"> <LayoutTemplate> <ul> <asp:Placeholder ID="itemPlaceholder" runat="server" /> </ul> </LayoutTemplate> <ItemTemplate> <l

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