or
'Telerik.Reporting.ReportParameter' does not contain a definition for 'UI' and no extension method 'UI' accepting a first argument of type 'Telerik.Reporting.ReportParameter' could be found (are you missing a using directive or an assembly reference?
int
labelStep = (dataList.Count / 10);
chartTrendByDay.DataSource = dataList;
if
(labelStep == 0)
labelStep = 1;
chartTrendByDay.PlotArea.XAxis.LabelStep = labelStep;