控件修改背景色

解決LayoutGroup控件背景色和標題背景色：

<Window x:Class="WpfApplication2.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" Height="350" Width="525" 
        xmlns:dxlc="http://schemas.devexpress.com/winfx/2008/xaml/layoutcontrol">
    <Window.Resources>
        <LinearGradientBrush x:Key="buttonBackground" StartPoint="0,0.5" EndPoint="0,1">
            <GradientStop Color="#FFCC00" Offset="0"/>
            <GradientStop Color="#FFFF33" Offset="1"/>
        </LinearGradientBrush>
        
         <Style TargetType="dxlc:GroupBox" x:Key="boxtest">
            <!--設置標題背景色-->
            <Setter Property="TitleBackground" Value="{StaticResource buttonBackground}"/>
            <!--<Setter Property="Foreground" Value="blue"/> 設置字體顏色-->
            <!--設置背景色-->
            <Setter Property="Background" Value="{StaticResource buttonBackground}"/>
        </Style>
    </Window.Resources>
    <Grid>
        <!--Style="{StaticResource test}" 可以加上-->
       <dxlc:LayoutGroup Name="secondGroup" Orientation="Vertical" View="GroupBox" Header="這是標題"
                              GroupBoxStyle="{StaticResource boxtest}"> 
                    
         <dxlc:LayoutItem Label="Item 1:">
            <TextBox/>
         </dxlc:LayoutItem>
       </dxlc:LayoutGroup>
    </Grid>
</Window>

註釋說的很清楚了。