I wan to put something in SelectedGroudHeader, so create a style as blow. I add ContentContainer "MyControl" to the header in template style.  Then I want to set different content for different OutlookBarGroup. For exaplme, different OutlookBarGroup with different menu inside MyControl.

Asthis style is applied to all OutlookBarGroup, how can I do it in xaml or in code-behind in this case?

<Style x:Key="SelectedHeaderStyle" TargetType="igPrim:SelectedGroupHeader">
            <Setter Property="Background">
                <Setter.Value>
                    <LinearGradientBrush StartPoint="0,0" EndPoint="0,1">
                        <LinearGradientBrush.GradientStops>
                            <GradientStopCollection>
                                <GradientStop Offset="0" Color="#FFba53be"/>
                                <GradientStop Offset="0.972" Color="#FF751a71"/>
                            </GradientStopCollection>
                        </LinearGradientBrush.GradientStops>
                    </LinearGradientBrush>
                </Setter.Value>
            </Setter>
            <Setter Property="BorderBrush" Value="#034A53BE"/>
            <Setter Property="Foreground" Value="#FFFFFFFF"/>
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="igPrim:SelectedGroupHeader">
                        <Grid Margin="0,0,0,1">
                            <Border Background="{TemplateBinding Background}" BorderThickness="0">
                                <Grid>
                                    <Grid.Resources>
                                        <igPrim:GroupHeaderConverter x:Key="HeaderConverter"/>
                                        <igPrim:BoolToVisibilityConverter x:Key="BoolToVisibilityConverter"/>
                                    </Grid.Resources>
                                    <Grid.ColumnDefinitions>
                                        <ColumnDefinition Width="*"/>
                                        <ColumnDefinition Width="Auto"/>
                                        <ColumnDefinition Width="Auto"/>
                                    </Grid.ColumnDefinitions>
                                    <ContentPresenter
                                        x:Name="ContentPresenterHeader"
                                        Grid.Column="0"
                                        Margin="7,7,8,3"
                                        Content="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=OutlookBar.SelectedGroup.Header, Converter={StaticResource HeaderConverter}}"
                                        ContentTemplate="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=OutlookBar.SelectedGroup.HeaderTemplate}"
                                        Visibility="Visible"/>


                  <ContentControl x:Name="MyControl"></ContentControl>


                                    <ToggleButton
                                        x:Name="MinimizeButton"
                                        Grid.Column="2"
                                        Margin="0,4,0,3"
                                        IsChecked="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=OutlookBar.IsMinimized, Mode=TwoWay}"
                                        RenderTransformOrigin="0.5 0.5"
                                        Style="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=OutlookBar.MinimizeToggleButtonStyle}"
                                        Visibility="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=OutlookBar.AllowMinimized, Converter={StaticResource BoolToVisibilityConverter}}">
                                        <ToolTipService.ToolTip>
                                            <Grid>
                                                <TextBlock x:Name="ExpandTooltip" Text="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=OutlookBar.StringSettings.MinimizeButtonExpandTooltip}" Visibility="Collapsed"/>
                                                <TextBlock x:Name="MinimizeTooltip" Text="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=OutlookBar.StringSettings.MinimizeButtonMinimizeTooltip}"/>
                                            </Grid>
                                        </ToolTipService.ToolTip>
                                        <ToggleButton.RenderTransform>
                                            <RotateTransform x:Name="TgbRotation" Angle="0"/>
                                        </ToggleButton.RenderTransform>
                                    </ToggleButton>
                                </Grid>
                            </Border>
                            <Border x:Name="innerBorder" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="1,1,0,0"/>
                            <VisualStateManager.VisualStateGroups>
                                <VisualStateGroup x:Name="MinimizedStates">
                                    <VisualState x:Name="Expanded">
                                        <Storyboard>
                                            <ObjectAnimationUsingKeyFrames
                                                BeginTime="00:00:00"
                                                Duration="00:00:00.001"
                                                Storyboard.TargetName="ContentPresenterHeader"
                                                Storyboard.TargetProperty="Visibility">
                                                <DiscreteObjectKeyFrame KeyTime="00:00:00" Value="Visible"/>
                                            </ObjectAnimationUsingKeyFrames>
                                        </Storyboard>
                                    </VisualState>
                                    <VisualState x:Name="Minimized">
                                        <Storyboard>
                                            <ObjectAnimationUsingKeyFrames
                                                BeginTime="00:00:00"
                                                Duration="00:00:00.001"
                                                Storyboard.TargetName="ContentPresenterHeader"
                                                Storyboard.TargetProperty="Visibility">
                                                <DiscreteObjectKeyFrame KeyTime="00:00:00" Value="Collapsed"/>
                                            </ObjectAnimationUsingKeyFrames>
                                            <ObjectAnimationUsingKeyFrames
                                                BeginTime="00:00:00"
                                                Duration="00:00:00.001"
                                                Storyboard.TargetName="MinimizeButton"
                                                Storyboard.TargetProperty="ToggleButton.RenderTransform.RotateTransform.Angle">
                                                <DiscreteObjectKeyFrame KeyTime="00:00:00" Value="180"/>
                                            </ObjectAnimationUsingKeyFrames>
                                            <ObjectAnimationUsingKeyFrames
                                                BeginTime="00:00:00"
                                                Duration="00:00:00.001"
                                                Storyboard.TargetName="MinimizeTooltip"
                                                Storyboard.TargetProperty="Visibility">
                                                <DiscreteObjectKeyFrame KeyTime="00:00:00" Value="Collapsed"/>
                                            </ObjectAnimationUsingKeyFrames>
                                            <ObjectAnimationUsingKeyFrames
                                                BeginTime="00:00:00"
                                                Duration="00:00:00.001"
                                                Storyboard.TargetName="ExpandTooltip"
                                                Storyboard.TargetProperty="Visibility">
                                                <DiscreteObjectKeyFrame KeyTime="00:00:00" Value="Visible"/>
                                            </ObjectAnimationUsingKeyFrames>
                                        </Storyboard>
                                    </VisualState>
                                </VisualStateGroup>
                            </VisualStateManager.VisualStateGroups>
                        </Grid>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>