Not sure if this is the entire problem, but at least you need to put that XAML code block within <ListView>
tag, and set attribute of the <ListView>
as opposed to <ListView.Resources>
:
<ListView x:Name="gui_listView" HorizontalAlignment="Left"
Height="610" Margin="48,54,0,0" VerticalAlignment="Top"
Width="256" SelectionChanged="gui_listView_SelectionChanged"
SelectionMode="Extended">
<ListView.Resources>
<SolidColorBrush x:Key="{x:Static SystemColors.HighlightBrushKey}"
Color="Transparent"/>
</ListView.Resources>
</ListView>