<telerik:RadScriptManager ID="RadScriptManager1" runat="server"></telerik:RadScriptManager>
         <script>
             function kendoChartInitializing(sender, args) {
                 var series = args.series;
                 for (var i = 0; i < series.length; i++) {                   
                     series[i].labels.background = "white";
                     series[i].labels.padding = 4;
                     series[i].labels.border = { width: 1, dashType: "solid", color: "black" }
                 }                                
             }
         </script>