private static PickedGeometry GetPickGeometry(RenderEventArgs arg, int x, int y, uint stageVertexId, List<IPickable> pickableRendererList) { PickedGeometry pickedGeometry = null; foreach (IPickable item in pickableRendererList) { pickedGeometry = item.GetPickedGeometry(arg, stageVertexId, x, y); if (pickedGeometry != null) { break; } } return pickedGeometry; }