WPF-改变Datagrid的选中行的颜色

用触发器改变Datagrid的选中行的颜色：

比如：以DataGrid为例：
			<DataGrid.RowStyle >
                                <Style TargetType="DataGridRow">
                                    <Setter Property="Background" Value="White"/>
                                    <Style.Triggers>
                                        <Trigger Property="IsMouseOver" Value="True">
                                            <Setter Property="Background" Value="LightGray"/>
                                        </Trigger>
                                        <Trigger Property="IsSelected" Value="True">
                                            <Setter Property="Background" Value="#90F670"/>
                                            <Setter Property="Foreground" Value="White"/>
                                        </Trigger>
                                    </Style.Triggers>
                                </Style>                                
    			</DataGrid.RowStyle>