How to list files in directory C# WPF

Use Path.GetFileNameWithoutExtension for retrieving the file name

string fileName = Path.GetFileNameWithoutExtension("C:\ProgramData\Microsoft\Windows\Start Menu\Programs\7-Zip\7-Zip File Manager.lnk);

For listing icons in a listbox, look into WPF ListView Class. You need to define a template in XAML for displaying images:

<ListView>
    <ListView.Resources>
        <DataTemplate x:Key="IconTemplate">
            <Grid>
                <Grid.ColumnDefinitions>
                    <ColumnDefinition Width="Auto"/>
                </Grid.ColumnDefinitions>
                <Image Grid.Column="0"/>
                <TextBlock Grid.Column="1" Text="{Binding Name}"/>
            </Grid>
        </DataTemplate>
    </ListView.Resources>            
    <ListView.View>     
        <GridView>
            <GridViewColumn CellTemplate="{StaticResource IconTemplate}" Header="Name"/>
            <GridViewColumn DisplayMemberBinding="{Binding FileName}" Header="File Name"/>                   
        </GridView>
    </ListView.View>
</ListView>

To extract the icon from file, you can use ExtractAssociatedIcon from System.Drawing namespace:

Icon icon = Icon.ExtractAssociatedIcon(filePath);