public IEnumerable<object> Render(PanelItem panelItem) { var upload = new FileUpload { Enabled = true, Visible = panelItem.Visible }; upload .AddStyle(CssClass.Item) .AttachToolTip(panelItem) .ToggleStyle(panelItem.Editable, CssClass.Editable, CssClass.ReadOnly); panelItem.Target = upload; return new List<Control> { upload, PanelValidator.Create(panelItem) }; }