Diamond Shape
The following image shows the diamond shape applied to a RadPanel:
The following code shows how you can create and apply a DiamondShape:
DiamondShape diamondShape = new DiamondShape();
radPanel1.PanelElement.Shape = diamondShape;
Dim diamondShape As New DiamondShape()
radPanel1.RootElement.Shape = diamondShape
radPanel1.RootElement.ApplyShapeToControl = True