wpf - want to make scrollable tabs for a tabcontrol

Question

Say I have a tab control, and I have over 50 tabs, where there is no enough space to hold so many tabs, how make these tabs scrollable?

Answer 1

Rick's answer actually breaks the vertical stretching of content inside the tabcontrol. It can be improved to retain vertical stretching by using a two row grid instead of a StackPanel.

<TabControl.Template>
            <ControlTemplate TargetType="TabControl">
                <Grid>
                    <Grid.RowDefinitions>
                        <RowDefinition Height="Auto" />
                        <RowDefinition />
                    </Grid.RowDefinitions>
                    <ScrollViewer HorizontalScrollBarVisibility="Auto"  VerticalScrollBarVisibility="Hidden" >
                        <TabPanel x:Name="HeaderPanel"
                          Panel.ZIndex ="1" 
                          KeyboardNavigation.TabIndex="1"
                          Grid.Column="0"
                          Grid.Row="0"
                          Margin="2,2,2,0"
                          IsItemsHost="true"/>
                    </ScrollViewer>
                    <ContentPresenter x:Name="PART_SelectedContentHost"
                                      SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"
                                      Margin="{TemplateBinding Padding}"
                                      ContentSource="SelectedContent" Grid.Row="1"/>
                </Grid>
            </ControlTemplate>
        </TabControl.Template>