TableView.ShowCheckBoxSelectorColumn Property

<Window
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:dxg="http://schemas.devexpress.com/winfx/2008/xaml/grid"
        x:Class="WpfApp41.MainWindow">
    <Grid>
        <dxg:GridControl Name="grid" SelectionMode="MultipleRow">
            <dxg:GridControl.Columns>
                <dxg:GridColumn FieldName="ID"/>
                <dxg:GridColumn FieldName="Name" Header="Name"/>
                <dxg:GridColumn FieldName="LastName" Header="Last Name"/>
                <dxg:GridColumn FieldName="Address" Header="Address"/>
                <dxg:GridColumn FieldName="PhoneNumber" Header="Phone Number"/>
            </dxg:GridControl.Columns>
            <dxg:GridControl.View>
                <dxg:TableView AllowFixedColumnMenu="True" ShowCheckBoxSelectorColumn="True"/>
            </dxg:GridControl.View>
        </dxg:GridControl>

    </Grid>
</Window>

using System.Collections.ObjectModel;
using System.Windows;

namespace WpfApp41 {
    public partial class MainWindow : Window {
        public MainWindow() {
            InitializeComponent();

            ObservableCollection<Customer> customers = new ObservableCollection<Customer>();
            for(int i = 1; i < 30; i++) {
                customers.Add(new Customer() { ID = i, Name = "Name" + i });
            }
            grid.ItemsSource = customers;
        }
        public class Customer {
            int id;
            string name;
            public int ID {
                get {
                    return id;
                }
                set {
                    id = value;
                }
            }

            public string Name {
                get {
                    return name;
                }
                set {
                    name = value;
                }
            }
        }
    }
}