or

<telerik:RadStyleSheetManager ID="rssm" runat="server"> <StyleSheets> <telerik:StyleSheetReference Assembly="Ourskinsproject.Skins" Name="Ourskinsproject.Skins.TreeView.Ourskin.css" />.Ourtreestyle .rtPlus, .rtMinus{ background-image: url('<%=WebResource("Ourskinsproject.Skins.TreeView.PlusMinus.png")%>');}'<%=WebResource("Ourskinsproject.Skins.TreeView.PlusMinus.png")%>' protected override void OnInit(EventArgs e) {... StyleSheetReference cssTreeview = new StyleSheetReference("Ourskinsproject.Skins.Treeview.Ourskin.css", "Ourskinsproject.Skins");... radStyleSheetManager.StyleSheets.Add(cssTreeview);

