item font to bold?

[Dewid]

How do I set ListBox item font to bold?

C# WPF - xaml:

<ListBox x:Name="gLBx"
Margin="5,0,5,0"
Foreground="#FF0000"
FontWeight="Bold"/>

This does not change the font to bold.

 

[Skydiver]

Seems to work for me:

Left listbox list item is bolder than the right listbox item.