public class AreaSeries3D :
    XYSeries3D,
    IGeometryHolder

Public Class AreaSeries3D
    Inherits XYSeries3D
    Implements IGeometryHolder

<Window x:Class="Area3DChart.Window1" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:dxc="http://schemas.devexpress.com/winfx/2008/xaml/charts" Title="Window1" Height="350" Width="500">
    <Grid>
        <dxc:ChartControl Name="chartControl1">
            <dxc:ChartControl.Diagram>
                <dxc:XYDiagram3D>
                    <dxc:XYDiagram3D.Series>
                        <!--region #Series1-->
                        <dxc:AreaSeries3D AreaWidth="0.7">
                            <dxc:AreaSeries3D.Points>
                                <dxc:SeriesPoint Argument="A" Value="10" />
                                <dxc:SeriesPoint Argument="B" Value="12" />
                                <dxc:SeriesPoint Argument="C" Value="14" />
                                <dxc:SeriesPoint Argument="D" Value="17" />
                            </dxc:AreaSeries3D.Points>
                        </dxc:AreaSeries3D>
                        <!--endregion #Series1-->
                        <!--region #Series2-->
                        <dxc:AreaSeries3D AreaWidth="0.7">
                            <dxc:AreaSeries3D.Points>
                                <dxc:SeriesPoint Argument="A" Value="5" />
                                <dxc:SeriesPoint Argument="B" Value="4" />
                                <dxc:SeriesPoint Argument="C" Value="10" />
                                <dxc:SeriesPoint Argument="D" Value="12" />
                            </dxc:AreaSeries3D.Points>
                        </dxc:AreaSeries3D>
                        <!--endregion #Series2-->
                    </dxc:XYDiagram3D.Series>
                </dxc:XYDiagram3D>
            </dxc:ChartControl.Diagram>
        </dxc:ChartControl>
    </Grid>
</Window>

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace Area3DChart {
    /// <summary>
    /// Interaction logic for Window1.xaml
    /// </summary>
    public partial class Window1 : Window {
        public Window1() {
            InitializeComponent();
        }
    }
}

<Application x:Class="Area3DChart.App" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" StartupUri="Window1.xaml">
    <Application.Resources>

    </Application.Resources>
</Application>

Imports Microsoft.VisualBasic
Imports System
Imports System.Collections.Generic
Imports System.Configuration
Imports System.Data
Imports System.Linq
Imports System.Windows

Namespace Area3DChart
    ''' <summary>
    ''' Interaction logic for App.xaml
    ''' </summary>
    Partial Public Class App
        Inherits Application
    End Class
End Namespace

Imports Microsoft.VisualBasic
Imports System
Imports System.Collections.Generic
Imports System.Linq
Imports System.Text
Imports System.Windows
Imports System.Windows.Controls
Imports System.Windows.Data
Imports System.Windows.Documents
Imports System.Windows.Input
Imports System.Windows.Media
Imports System.Windows.Media.Imaging
Imports System.Windows.Navigation
Imports System.Windows.Shapes

Namespace Area3DChart
    ''' <summary>
    ''' Interaction logic for Window1.xaml
    ''' </summary>
    Partial Public Class Window1
        Inherits Window
        Public Sub New()
            InitializeComponent()
        End Sub
    End Class
End Namespace