DashStyle Enumeration

using System;
using System.Windows.Forms;
using DevExpress.XtraCharts;
// ... 

private void Form1_Load(object sender, EventArgs e) {
    // Create a new chart. 
    ChartControl lineChart = new ChartControl();

    // Create a line series. 
    Series series1 = new Series("Series 1", ViewType.Line);

    // Add points to it. 
    series1.Points.Add(new SeriesPoint(1, 2));
    series1.Points.Add(new SeriesPoint(2, 12));
    series1.Points.Add(new SeriesPoint(3, 14));
    series1.Points.Add(new SeriesPoint(4, 17));

    // Add the series to the chart. 
    lineChart.Series.Add(series1);

    // Set the numerical argument scale types for the series, 
    // as it is qualitative, by default. 
    series1.ArgumentScaleType = ScaleType.Numerical;

    // Access the view-type-specific options of the series. 
    ((LineSeriesView)series1.View).MarkerVisibility = DevExpress.Utils.DefaultBoolean.True;
    ((LineSeriesView)series1.View).LineMarkerOptions.Kind = MarkerKind.Triangle;
    ((LineSeriesView)series1.View).LineStyle.DashStyle = DashStyle.Dash;

    // Access the type-specific options of the diagram. 
    ((XYDiagram)lineChart.Diagram).EnableAxisXZooming = true;

    // Hide the legend (if necessary). 
    lineChart.Legend.Visibility = DevExpress.Utils.DefaultBoolean.False;

    // Add a title to the chart (if necessary). 
    lineChart.Titles.Add(new ChartTitle());
    lineChart.Titles[0].Text = "A Line Chart";

    // Add the chart to the form. 
    lineChart.Dock = DockStyle.Fill;
    this.Controls.Add(lineChart);
}

Imports System
Imports System.Windows.Forms
Imports DevExpress.XtraCharts
' ... 

Private Sub Form1_Load(ByVal sender As Object, ByVal e As EventArgs) _ 
Handles MyBase.Load
    ' Create a new chart. 
    Dim lineChart As New ChartControl()

    ' Create a line series. 
    Dim series1 As New Series("Series 1", ViewType.Line)

    ' Add points to it. 
    series1.Points.Add(New SeriesPoint(1, 2))
    series1.Points.Add(New SeriesPoint(2, 12))
    series1.Points.Add(New SeriesPoint(3, 14))
    series1.Points.Add(New SeriesPoint(4, 17))

    ' Add the series to the chart. 
    lineChart.Series.Add(series1)

    ' Set the numerical argument scale types for the series, 
    ' as it is qualitative, by default. 
    series1.ArgumentScaleType = ScaleType.Numerical

    ' Access the view-type-specific options of the series. 
    CType(series1.View,LineSeriesView).MarkerVisibility = DevExpress.Utils.DefaultBoolean.True 
    CType(series1.View, LineSeriesView).LineMarkerOptions.Kind = MarkerKind.Triangle
    CType(series1.View, LineSeriesView).LineStyle.DashStyle = DashStyle.Dash

    ' Access the type-specific options of the diagram. 
    CType(lineChart.Diagram, XYDiagram).EnableAxisXZooming = True 

    ' Hide the legend (if necessary). 
    lineChart.Legend.Visibility = DevExpress.Utils.DefaultBoolean.False 

    ' Add a title to the chart (if necessary). 
    lineChart.Titles.Add(New ChartTitle())
    lineChart.Titles(0).Text = "A Line Chart" 

    ' Add the chart to the form. 
    lineChart.Dock = DockStyle.Fill
    Me.Controls.Add(lineChart)
End Sub