public override NSString GetFormattedDataMarkerLabel(SFChart chart, NSString label, nint index, SFSeries series) { try { int seriesIndex = (int)chart.IndexOfSeries(series); IList data = Chart.Series[seriesIndex].ItemsSource as IList; //string formattedLabel = label.ToString() + " (" + (data[(int)index] as ChartModel).Name + ")"; return(new NSString(label.ToString())); }catch (Exception ex) { MessagingCenter.Send((App)Xamarin.Forms.Application.Current, AppConstant.ErrorEvent, ex.ToString()); } return(new NSString("")); }