将背景色数据网格更改为mahapp wpf

Question

我尝试使用mahapp颜色更改datagrid的背景颜色，但我不知道为什么它没有更改

<StackPanel>
    <TextBlock HorizontalAlignment="Center" VerticalAlignment="Center" Foreground="White" Margin="20" FontSize="16" Text="Databse"/>

    <DataGrid  AutoGenerateColumns="False" 
               ScrollViewer.CanContentScroll="True"
               MaxHeight ="500" 
               HeadersVisibility="None"
               ScrollViewer.VerticalScrollBarVisibility="Auto"
               ScrollViewer.HorizontalScrollBarVisibility="Auto" 
               Margin="20 0 20 20"
               BorderThickness="0"
               ItemsSource="{Binding Lecturers}">

        <DataGrid.Resources>
            <SolidColorBrush x:Key="MahApps.Brushes.ThemeBackground" Color="#38364E" />
            <SolidColorBrush x:Key="MahApps.Brushes.Text" Color="White"/>
        </DataGrid.Resources>

        <DataGrid.Columns >
            <DataGridTextColumn  Header="Project Name" Binding="{Binding Name}">

            </DataGridTextColumn>
        </DataGrid.Columns>


    </DataGrid>
</StackPanel>

总是结果

Answer 1