How to display errorbars in WinForms Chart?

Error bars are used to represent the variability of data in WinForms charts, showing the upper and lower bounds of the data points. In this guide, we will explain how to enable error bars, customize their appearance, and specify different symbols for various series in Syncfusion® WinForms Charts.

Error bars can be displayed by setting the DrawErrorBars property to true. You can also customize the shape of the error bar's symbol using the ErrorBarsSymbolShape property. Currently, error bars can be applied only to line charts, where the symbol signifies the top and bottom errors of the chart. Moreover, you can specify separate symbols to represent different series. 

//Assign the X and Y axes
this.chartControl1.PrimaryXAxis.ValueType = ChartValueType.Double;
this.chartControl1.PrimaryYAxis.ValueType = ChartValueType.Double;

// Configure the chart series
ChartSeries series = new ChartSeries("Series", ChartSeriesType.Line);
series.Points.Add(1, new double[] { 15, 3 });
series.Points.Add(2, new double[] { 28, 6 });
series.Points.Add(3, new double[] { 23, 5 });
series.Points.Add(4, new double[] { 35, 7 });
series.Points.Add(5, new double[] { 12, 2 });
series.Points.Add(6, new double[] { 41, 6 });
series.Points.Add(7, new double[] { 30, 5 });
this.chartControl1.Series.Add(series);

//Enable error bars to the line chart
this.chartControl1.Series[0].DrawErrorBars = true;
this.chartControl1.Series[0].ErrorBarsSymbolShape = ChartSymbolShape.Circle;

'Assign the X And Y axes
lineChart.PrimaryXAxis.ValueType = ChartValueType.Double
lineChart.PrimaryYAxis.ValueType = ChartValueType.Double

'Configure the chart series
Dim series = New ChartSeries("Series", ChartSeriesType.Line)
series.Points.Add(1, New Double() {15, 3})
series.Points.Add(2, New Double() {28, 6})
series.Points.Add(3, New Double() {23, 5})
series.Points.Add(4, New Double() {35, 7})
series.Points.Add(5, New Double() {12, 2})
series.Points.Add(6, New Double() {41, 6})
series.Points.Add(7, New Double() {30, 5})
lineChart.Series.Add(series)

'Enable error bars to the line chart
lineChart.Series(0).DrawErrorBars = True
lineChart.Series(0).ErrorBarsSymbolShape = ChartSymbolShape.Circle