改变ListBoxItem中的文本色彩

改变ListBoxItem中的文本颜色
我的ListBoxItem上有一个TextBlock和一个Button，当ListBoxItem被选中后，我希望TextBlock和Button中的文本颜色都要发生变化，可我试了，只有TextBlock颜色变了，Button没有变化。
                            <Style x:Key="ListBoxItemStyle" TargetType="{x:Type ListBoxItem}">
                                <Setter Property="Padding" Value="0" />
                                <Setter Property="Template">
                                    <Setter.Value>
                                        <ControlTemplate TargetType="ListBoxItem">
                                            <Grid Background="{TemplateBinding Background}">
                                                <Grid.ColumnDefinitions>
                                                    <ColumnDefinition/>
                                                    <ColumnDefinition/>
                                                </Grid.ColumnDefinitions>
                                                <Border Grid.Column="0" Background="{TemplateBinding Background}">
                                                    <ContentPresenter 
                                                        HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
                                                        VerticalAlignment="{TemplateBinding VerticalContentAlignment}">
                                                    </ContentPresenter>
                                                </Border>
                                                <Button  Grid.Column="1" Margin="10,0,0,0">aaa</Button>
                                            </Grid>
                                        </ControlTemplate>
                                    </Setter.Value>
                                </Setter>
                                <Style.Triggers>
                                    <Trigger Property="ListBoxItem.IsSelected" Value="true">
                                        <Setter Property="ListBoxItem.Foreground" Value="#ffff0000"/>
                                    </Trigger>
                                    <Trigger Property="ListBoxItem.IsSelected" Value="false">
                                        <Setter Property="ListBoxItem.Foreground" Value="#ff000000"/>
                                    </Trigger>
                                </Style.Triggers>
                            </Style>
------解决思路----------------------
<Button Grid.Column="1" Margin="10,0,0,0" Foreground="{TemplateBinding Foreground}">aaa</Button>