ListBox Style Not Working - wpf

Question

I am trying to get the highlight color of the selected items in my ListBox to stay the same when the ListBox loses focus. After hours scouring the internet and trying different solutions I can't get anything to work. Please help me understand why the solution I'm trying now doesn't seem to change anything.
This is defined at the top of my xaml within Window:
<Window.Resources>
<Style x:Key="myListboxStyle">
<Style.Resources>
<SolidColorBrush x:Key="{x:Static SystemColors.HighlightBrushKey}" Color="Red" />
<SolidColorBrush x:Key="{x:Static SystemColors.ControlBrushKey}" Color="Red" />
</Style.Resources>
</Style>
</Window.Resources>
and this is my listbox:
<ListBox x:Name="lstNaes" Style="{StaticResource myListboxStyle}" DisplayMemberPath="Name" Margin="5" SelectionMode="Extended"/>
The color (red) is just to test. What I really want is the default highlight color, and for it to not change when the ListBox (or ListView) loses focus. I don't understand why no solutions I've found seem to work for me.

Answer 1

If you are on Windows 8 or later you should define a custom ControlTemplate for the ListViewItem containers:
<ListBox x:Name="lstNaes" DisplayMemberPath="Name" Margin="5" SelectionMode="Extended">
<ListBox.ItemContainerStyle>
<Style TargetType="ListBoxItem">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type ListBoxItem}">
<Border x:Name="Bd" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" Padding="{TemplateBinding Padding}" SnapsToDevicePixels="true">
<ContentPresenter HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}"/>
</Border>
<ControlTemplate.Triggers>
<Trigger Property="IsMouseOver" Value="True">
<Setter Property="Background" TargetName="Bd" Value="#1F26A0DA"/>
<Setter Property="BorderBrush" TargetName="Bd" Value="#a826A0Da"/>
</Trigger>
<Trigger Property="IsSelected" Value="True">
<Setter Property="Background" TargetName="Bd" Value="#3D26A0DA"/>
<Setter Property="BorderBrush" TargetName="Bd" Value="#FF26A0DA"/>
</Trigger>
<Trigger Property="IsEnabled" Value="False">
<Setter Property="TextElement.Foreground" TargetName="Bd" Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</ListBox.ItemContainerStyle>
</ListBox>