[XtraChartsLocalizableCategory(XtraChartsCategory.Layout)]
public int BarDistanceFixed { get; set; }

<XtraChartsLocalizableCategory(XtraChartsCategory.Layout)>
Public Property BarDistanceFixed As Integer

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

namespace SideBySideBar2D {
    public partial class Form1 : Form {
        public Form1() {
            InitializeComponent();
        }
        private void Form1_Load(object sender, EventArgs e) {
            // Create an empty chart.
            ChartControl chart = new ChartControl();

            // Bind a chart to a data source.
            chart.DataSource = DataPoint.GetDataPoints();

            // Create the first series and specify its data members.
            Series series1 = new Series("2018", ViewType.Bar);
            series1.ArgumentDataMember = "Region";
            series1.ValueDataMembers.AddRange("Value1");

            // Create the second series and specify its data members.
            Series series2 = new Series("2019", ViewType.Bar);
            series2.ArgumentDataMember = "Region";
            series2.ValueDataMembers.AddRange("Value2");

            // Add series to the chart.
            chart.Series.AddRange(new Series[] { series1, series2 });

            // Change the first series's view settings.
            SideBySideBarSeriesView view1 = series1.View as SideBySideBarSeriesView;
            // The BarDistance, BarDistanceFixed, and EqualBarWidth property values are synchronized 
            // in all Side-by-Side Bar Series in a ChartControl.
            // So, you can specify them only for one series view.
            view1.BarDistance = 0.1;
            view1.BarDistanceFixed = 2;
            view1.BarWidth = 0.4;
            view1.EqualBarWidth = true;
            view1.Color = Color.MediumSeaGreen;

            // Change the second series's view settings.
            SideBySideBarSeriesView view2 = series2.View as SideBySideBarSeriesView;
            view2.BarWidth = 0.4;
            view2.Color = Color.MediumVioletRed;

            // Change the legend position.
            chart.Legend.AlignmentHorizontal = LegendAlignmentHorizontal.Right;
            chart.Legend.AlignmentVertical = LegendAlignmentVertical.Bottom;

            // Rotate the diagram.
            ((XYDiagram)chart.Diagram).Rotated = true;

            // Configure the x-axis appearance.
            ((XYDiagram)chart.Diagram).AxisX.Tickmarks.MinorVisible = false;
            ((XYDiagram)chart.Diagram).AxisX.Reverse = true;

            // Add a title to the chart.
            ChartTitle chartTitle1 = new ChartTitle();
            chartTitle1.Text = "Sales by Region";
            chart.Titles.Add(chartTitle1);

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

    public class DataPoint {
        public string Region { get; set; }
        public double Value1 { get; set; }
        public double Value2 { get; set; }
        public DataPoint(string region, double value1, double value2) {
            this.Region = region;
            this.Value1 = value1;
            this.Value2 = value2;
        }
        public static BindingList<DataPoint> GetDataPoints() {
            BindingList<DataPoint> data = new BindingList<DataPoint> {
                new DataPoint("Asia", 4.7685, 5.289),
                new DataPoint("Australia", 1.9576, 2.2727),
                new DataPoint("Europe", 3.0884, 3.7257),
                new DataPoint("North America", 3.7477, 4.1825),
                new DataPoint("South America", 1.8945, 2.1172),
            };
            return data;
        }
    }
}

Imports DevExpress.XtraCharts
Imports System
Imports System.Drawing
Imports System.Windows.Forms

Namespace SideBySideBar2D
    Public Partial Class Form1
        Inherits Form

        Public Sub New()
            InitializeComponent
        End Sub

        Private Sub Form1_Load(ByVal sender As Object, ByVal e As EventArgs)
            ' Create an empty chart.
            Dim chart As ChartControl = New ChartControl

            ' Bind a chart to a data source.
            chart.DataSource = DataPoint.GetDataPoints

            ' Create the first series and specify its data members.
            Dim series1 As Series = New Series("2018", ViewType.Bar)
            series1.ArgumentDataMember = "Region"
            series1.ValueDataMembers.AddRange("Value1")

            ' Create the second series and specify its data members.
            Dim series2 As Series = New Series("2019", ViewType.Bar)
            series2.ArgumentDataMember = "Region"
            series2.ValueDataMembers.AddRange("Value2")

            ' Add series to the chart.
            chart.Series.AddRange(New Series() {series1, series2})

            ' Change the first series's view settings.
            Dim view1 As SideBySideBarSeriesView = TryCast(series1.View, SideBySideBarSeriesView)

            ' The BarDistance, BarDistanceFixed, and EqualBarWidth property values are synchronized 
            ' in all Side-by-Side Bar Series in a ChartControl.
            ' So, you can specify them only for one series view.
            view1.BarDistance = 0.1
            view1.BarDistanceFixed = 2
            view1.BarWidth = 0.4
            view1.EqualBarWidth = True
            view1.Color = Color.MediumSeaGreen

            ' Change the second series's view settings.
            Dim view2 As SideBySideBarSeriesView = TryCast(series2.View, SideBySideBarSeriesView)
            view2.BarWidth = 0.4
            view2.Color = Color.MediumVioletRed

            ' Change the legend position.
            chart.Legend.AlignmentHorizontal = LegendAlignmentHorizontal.Right
            chart.Legend.AlignmentVertical = LegendAlignmentVertical.Bottom

            ' Rotate the diagram.
            CType(chart.Diagram, XYDiagram).Rotated = True

            ' Configure the x-axis appearance.
            CType(chart.Diagram, XYDiagram).AxisX.Tickmarks.MinorVisible = False
            CType(chart.Diagram, XYDiagram).AxisX.Reverse = True

            ' Add a title to the chart.
            Dim chartTitle1 As ChartTitle = New ChartTitle
            chartTitle1.Text = "Sales by Region"
            chart.Titles.Add(chartTitle1)

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

    Public Class DataPoint
        Public Property Region As String
        Public Property Value1 As Double
        Public Property Value2 As Double

        Public Sub New(ByVal region As String, ByVal value1 As Double, ByVal value2 As Double)
            Me.Region = region
            Me.Value1 = value1
            Me.Value2 = value2
        End Sub

        Public Shared Function GetDataPoints() As BindingList(Of DataPoint)
            Dim data As BindingList(Of DataPoint) = New BindingList(Of DataPoint) From {
                New DataPoint("Asia", 4.7685, 5.289),
                New DataPoint("Australia", 1.9576, 2.2727),
                New DataPoint("Europe", 3.0884, 3.7257),
                New DataPoint("North America", 3.7477, 4.1825),
                New DataPoint("South America", 1.8945, 2.1172)
            }
            Return data
        End Function
    End Class
End Namespace