Any way to make a Separator within a WPF menu more narrow?

I've noticed that the margin or height 开发者_如何学Pythonof the default Separator as it is styled in the menus in WPF seems to be slightly larger than some other applications such as Visual Studio 2010. I know that these Separators can be re-templated by applying a new style with a custom ControlTemplate but like always I'm looking for any possible way to change this without having to manually re-define the composition of the control.

If what I'm asking for isn't possible I will accept an answer if somebody can provide an authoritative and exhaustive explanation. Also I would like to stress that I'm not interested in a lecture about how to redefine the ControlTemplate as I'm treating that as the last resort and I'm already aware of how to accomplish this.

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The style for the aero.normalcolor MenuItem Separator looks like this:

<Style x:Key="{x:Static MenuItem.SeparatorStyleKey}"
       TargetType="{x:Type Separator}">
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="{x:Type Separator}">
                <Grid SnapsToDevicePixels="true" Margin="0,6,0,4">
                    <Rectangle Height="1"
                               Margin="30,0,1,1"
                               Fill="#E0E0E0"/>
                    <Rectangle Height="1"
                               Margin="30,1,1,0"
                               Fill="White"/>
                </Grid>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>

You would need to copy this style to your app.xaml and change the Margin="0,6,0,4" to match your preferences.

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I always use negative margin: <Separator Margin="0,-4" />.

Edit 2022-03-15: Does not work anymore since Windows 10 came out.