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VB.NET
<UserControl x:Class="AreaChart.MainPage"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:dxc="http://schemas.devexpress.com/winfx/2008/xaml/charts"
mc:Ignorable="d"
d:DesignHeight="300" d:DesignWidth="400" >
<Grid x:Name="LayoutRoot" Background="White">
<dxc:ChartControl Name="chartControl1" >
<dxc:ChartControl.Diagram>
<dxc:XYDiagram2D>
<dxc:XYDiagram2D.Series>
<dxc:AreaSeries2D DisplayName="First Series" Transparency="0.5">
<dxc:AreaSeries2D.Points>
<dxc:SeriesPoint Argument="A" Value="1" />
<dxc:SeriesPoint Argument="B" Value="3" />
<dxc:SeriesPoint Argument="C" Value="7" />
<dxc:SeriesPoint Argument="D" Value="4" />
</dxc:AreaSeries2D.Points>
</dxc:AreaSeries2D>
<dxc:AreaSeries2D DisplayName="Second Series" Transparency="0.5">
<dxc:AreaSeries2D.Points>
<dxc:SeriesPoint Argument="A" Value="2" />
<dxc:SeriesPoint Argument="B" Value="2" />
<dxc:SeriesPoint Argument="C" Value="5" />
<dxc:SeriesPoint Argument="D" Value="4" />
</dxc:AreaSeries2D.Points>
</dxc:AreaSeries2D>
</dxc:XYDiagram2D.Series>
<!--region #SideMarginsEnabled-->
<dxc:XYDiagram2D.AxisX>
<dxc:AxisX2D />
</dxc:XYDiagram2D.AxisX>
<!--endregion #SideMarginsEnabled-->
</dxc:XYDiagram2D>
</dxc:ChartControl.Diagram>
<dxc:ChartControl.Legend>
<dxc:Legend />
</dxc:ChartControl.Legend>
</dxc:ChartControl>
</Grid>
</UserControl>

C#
<UserControl x:Class="AreaChart.MainPage"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:dxc="http://schemas.devexpress.com/winfx/2008/xaml/charts"
mc:Ignorable="d"
d:DesignHeight="300" d:DesignWidth="400" >
<Grid x:Name="LayoutRoot" Background="White">
<dxc:ChartControl Name="chartControl1" >
<dxc:ChartControl.Diagram>
<dxc:XYDiagram2D>
<dxc:XYDiagram2D.Series>
<dxc:AreaSeries2D DisplayName="First Series" Transparency="0.5">
<dxc:AreaSeries2D.Points>
<dxc:SeriesPoint Argument="A" Value="1" />
<dxc:SeriesPoint Argument="B" Value="3" />
<dxc:SeriesPoint Argument="C" Value="7" />
<dxc:SeriesPoint Argument="D" Value="4" />
</dxc:AreaSeries2D.Points>
</dxc:AreaSeries2D>
<dxc:AreaSeries2D DisplayName="Second Series" Transparency="0.5">
<dxc:AreaSeries2D.Points>
<dxc:SeriesPoint Argument="A" Value="2" />
<dxc:SeriesPoint Argument="B" Value="2" />
<dxc:SeriesPoint Argument="C" Value="5" />
<dxc:SeriesPoint Argument="D" Value="4" />
</dxc:AreaSeries2D.Points>
</dxc:AreaSeries2D>
</dxc:XYDiagram2D.Series>
<!--region #SideMarginsEnabled-->
<dxc:XYDiagram2D.AxisX>
<dxc:AxisX2D >
<dxc:AxisX2D.Range>
<dxc:AxisRange SideMarginsEnabled="True" />
</dxc:AxisX2D.Range>
</dxc:AxisX2D>
</dxc:XYDiagram2D.AxisX>
<!--endregion #SideMarginsEnabled-->
</dxc:XYDiagram2D>
</dxc:ChartControl.Diagram>
<dxc:ChartControl.Legend>
<dxc:Legend />
</dxc:ChartControl.Legend>
</dxc:ChartControl>
</Grid>
</UserControl>