or
To prevent possible data loss before loading the designer, the following errors must be resolved:
Value cannot be null. Parameter name: instance
this.compareCityAvgReport.PlotArea.YAxis.AutoScale = false;this.compareCityAvgReport.PlotArea.YAxis.LabelStep = 1;this.compareCityAvgReport.PlotArea.YAxis.AddRange(0, 100, 10);this.compareCityAvgReport.PlotArea.YAxis.Appearance.ValueFormat = Telerik.Reporting.Charting.Styles.ChartValueFormat.Percent;this.compareCityAvgReport.PlotArea.YAxis.Appearance.CustomFormat = "#%";this.compareCityAvgReport.PlotArea.YAxis2.Visible = Telerik.Reporting.Charting.Styles.ChartAxisVisibility.True;this.compareCityAvgReport.PlotArea.YAxis2.AutoScale = false;this.compareCityAvgReport.PlotArea.YAxis2.AddRange(0, 100, 10);this.compareCityAvgReport.PlotArea.YAxis2.Appearance.Color = System.Drawing.Color.Black;this.compareCityAvgReport.PlotArea.YAxis2.Appearance.ValueFormat = Telerik.Reporting.Charting.Styles.ChartValueFormat.Percent;this.compareCityAvgReport.PlotArea.YAxis2.Appearance.CustomFormat = "#%";