WPF Separator not showing in ToolBar OverflowPanel - wpf

Question

it seems that a WPF Separator doesn't show up in a ToolBar's Overflow panel when you shrink the size of the toolbar; is there someway to make it show? (I can get around it by using an empty colored label, but I'd still like to know why separators don't work).
An example: create a new WPF project with in the mainwindow.xaml:
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
<ToolBar HorizontalAlignment="Left" Name="toolBar1">
<Button Content="ASDF" />
<Button Content="ASDF" />
<Button Content="ASDF" />
<Button Content="ASDF" />
<Button Content="ASDF" />
<Button Content="ASDF" />
<Button Content="ASDF" />
<Button Content="ASDF" />
<Separator />
<Button Content="ASDF" />
<Button Content="ASDF" />
<Button Content="ASDF" />
<Button Content="ASDF" />
<Button Content="ASDF" />
<Button Content="ASDF" />
<Button Content="ASDF" />
<Button Content="ASDF" />
<Button Content="ASDF" />
</ToolBar>
</Grid>

Answer 1

My problem was answered on MSDN; you need to wrap it in a grid and rotate it 90 degrees:
<Grid Width="10">
<Separator>
<Separator.LayoutTransform>
<RotateTransform Angle="90" />
</Separator.LayoutTransform>
</Separator>
</Grid>
However in my actual project I didn't need to do the rotation for some reason or other.

Answer 2

Please try it this is showing separator with overflow and you can set the overflow with each element by "overflowmode" property.
<ToolBarPanel>
<ToolBar ToolBarTray.IsLocked="True" Name="toolBar1">
<ToolBar Band="1" BandIndex="1">
<Button Content="ASDF" />
<Button Content="ASDF" />
<Button Content="ASDF" />
</ToolBar>
<Separator/>
<ToolBar Band="2" BandIndex="1">
<Button Content="ASDF" />
<Button Content="ASDF" />
</ToolBar>
<Separator/>
<ToolBar Band="2" BandIndex="2">
<Button Content="ASDF" />
<Button Content="ASDF" />
<Button Content="ASDF" ToolBar.OverflowMode="Always"/>
<Button Content="ASDF" ToolBar.OverflowMode="Always" />
</ToolBar>
</ToolBar>
</ToolBarPanel>
Hope this help you.