<ListBox Name="lbInstalledFonts" VerticalContentAlignment="Center" DisplayMemberPath="Name" ItemsSource="{Binding Source={new System.Drawing.Text.InstalledFontCollection().Familes}}" />

<Window x:Class="HelpStackOverflow.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:drawing="clr-namespace:System.Drawing.Text;assembly=System.Drawing"
        Title="MainWindow" Height="350" Width="525">
    <Window.Resources>
        <drawing:InstalledFontCollection x:Key="InstalledFontCollection" />
    </Window.Resources>
    <Grid>
        <ListBox Name="lbInstalledFonts"
                 VerticalContentAlignment="Center"
                 DisplayMemberPath="Name"
                 ItemsSource="{Binding Source={StaticResource InstalledFontCollection}, Path=Families}" />
    </Grid>
</Window>