RadControls for ASP.NET AJAX
If grouping is enabled, Telerik RadGrid will allow grouping by column(s). You need to drag-and-drop the headers of one or more columns on the group panel to define the grouping.
You can modify panel's appearance using PanelStyle and PanelItemsStyle properties. The PanelStyle property customizes the panel itself, and the PanelItemStyle property customizes the items in this panel.