[Browsable(false)]
[XtraSerializableProperty(true, true, true)]
[XtraSerializablePropertyId(3)]
public virtual GridBandCollection Children { get; }

<Browsable(False)>
<XtraSerializableProperty(True, True, True)>
<XtraSerializablePropertyId(3)>
Public Overridable ReadOnly Property Children As GridBandCollection

using DevExpress.XtraGrid.Views.BandedGrid;
using System;
using System.ComponentModel;

namespace DXApplication {
    public partial class Form1 : DevExpress.XtraEditors.XtraForm {
        public Form1() {
            InitializeComponent();
            gridControl1.DataSource = new BindingList<DataItem>() {
                new DataItem(){ StringProperty = "Value A", BooleanProperty = true, IntegerProperty = 10 },
                new DataItem(){ StringProperty = "Value B", BooleanProperty = true, IntegerProperty = 15 },
                new DataItem(){ StringProperty = "Value C", BooleanProperty = false, IntegerProperty = 20 },
            };
            this.Load += Form1_Load;
        }

        void Form1_Load(object sender, EventArgs e) {
            // Creates the first child band.
            GridBand childBand1 = rootBand.Children.AddBand("Child Band 1");
            // Adds the 'StringProperty' column to the first child band using the column's OwnerBand property.
            bandedGridView1.Columns["StringProperty"].OwnerBand = childBand1;
            // Adds the 'IntegerProperty' column to the first child band using the band.Columns.Add() method.
            childBand1.Columns.Add(bandedGridView1.Columns["IntegerProperty"]);

            // Creates the second child band.
            GridBand childBand2 = rootBand.Children.AddBand("Child Band 2");
            childBand2.Columns.Add(bandedGridView1.Columns["BooleanProperty"]);
        }
    }
    public class DataItem {
        public string StringProperty { get; set; }
        public int IntegerProperty{ get; set; }
        public bool BooleanProperty { get; set; }
    }
}

Imports DevExpress.XtraGrid.Views.BandedGrid
Imports System
Imports System.ComponentModel

Namespace DXApplication
    Partial Public Class Form1
        Inherits DevExpress.XtraEditors.XtraForm

        Public Sub New()
            InitializeComponent()
            gridControl1.DataSource = New BindingList(Of DataItem)() From {
                New DataItem() With {
                    .StringProperty = "Value A",
                    .BooleanProperty = True,
                    .IntegerProperty = 10
                },
                New DataItem() With {
                    .StringProperty = "Value B",
                    .BooleanProperty = True,
                    .IntegerProperty = 15
                },
                New DataItem() With {
                    .StringProperty = "Value C",
                    .BooleanProperty = False,
                    .IntegerProperty = 20
                }
            }
            AddHandler Me.Load, AddressOf Form1_Load
        End Sub

        Private Sub Form1_Load(ByVal sender As Object, ByVal e As EventArgs)
            ' Creates the first child band.
            Dim childBand1 As GridBand = rootBand.Children.AddBand("Child Band 1")
            ' Adds the 'StringProperty' column to the first child band using the column's OwnerBand property.
            bandedGridView1.Columns("StringProperty").OwnerBand = childBand1
            ' Adds the 'IntegerProperty' column to the first child band using the band.Columns.Add() method.
            childBand1.Columns.Add(bandedGridView1.Columns("IntegerProperty"))

            ' Creates the second child band.
            Dim childBand2 As GridBand = rootBand.Children.AddBand("Child Band 2")
            childBand2.Columns.Add(bandedGridView1.Columns("BooleanProperty"))
        End Sub
    End Class
    Public Class DataItem
        Public Property StringProperty() As String
        Public Property IntegerProperty() As Integer
        Public Property BooleanProperty() As Boolean
    End Class
End Namespace