Tab Control without a line when selected

I want to show Tab control in WPF without using a line. My code as follows:-

            <TabItem Header="Tab 0">
            <TabItem.Style>
                <Style TargetType="{x:Type TabItem}">
                    <Setter Property="Template">
                        <Setter.Value>
                            <ControlTemplate TargetType="{x:Type TabItem}">
                                <Grid>
                                    <Border  Name="Border" Margin="0,0,0,0" BorderBrush="Gray">
                                        <ContentPresenter x:Name="ContentSite" VerticalAlignment="Center" HorizontalAlignment="Center" ContentSource="Header" Margin="12,2,12,2" RecognizesAccessKey="True"/>
                                    </Border>
                                </Grid>
                                <ControlTemplate.Triggers>

                                    <Trigger Property="IsSelected" Value="True">
                                        <Setter Property="Panel.ZIndex" Value="100" />
                                        <Setter TargetName="Border" Property="Background" Value="White" />
                                        <Setter TargetName="Border" Property="BorderThickness" Value="1,1,1,0" />
                                    </Trigger>

                                    <Trigger Property="IsSelected" Value="False">
                                        <Setter TargetName="Border" Property="Background" Value="#DDDDDD" />
                                        <Setter TargetName="Border" Property="BorderThickness" Value="1,1,1,0" />
                                    </Trigger>
                                    <Trigger Property="IsMouseOver" Value="True">
                                        <Setter TargetName="Border" Property="Background" Value="White" />
                                        <Setter TargetName="Border" Property="BorderThickness" Value="1,1,1,0" />
                                    </Trigger>

                                </ControlTemplate.Triggers>
                            </ControlTemplate>
                        </Setter.Value>
                    </Setter>
                </Style>
            </TabItem.Style>

            <Grid Background="White" />
        </TabItem>

When I don't use style <TabItem.Style> Tab is coming without Line as per my requirement, but I need to use <TabItem.Style> because of the requirement.

Please help.

Thanks