System.Web 2.0.0.0 System.Enum To be added. Specifies the general layout of items within a composite control. Field System.Web.UI.WebControls.Orientation Lays out the elements of the control in a horizontal manner. Most controls are side-by-side, with very little stacking of controls. 2.0.0.0 Field System.Web.UI.WebControls.Orientation Lays out the elements of the control in a vertical manner. Most controls are stacked, with few controls side-by-side. 2.0.0.0