WPF

Line V_Line = new Line();
V_Line.Stroke = System.Windows.Media.Brushes.Gray;
V_Line.StrokeThickness = 4;
V_Line.X1 = 0;
V_Line.Y1 = 0;
V_Line.X2 = New_Figure_Canvas.Width;
V_Line.Y2 = 0;

New_Figure_Canvas.Children.Add(V_Line);

RootFolder
   |_Folder_A
       |_ File_1
       |_ File_2
       |_ Folder_A1
           |_ File_5
           |_ File_6
           |_ Folder_A2
   |_Folder_B
       |_ File_3
       |_ File_4
       |_ Folder_B1

<HierarchicalDataTemplate DataType="{x:Type models:FolderModel}"
                            ItemsSource="{Binding Path=Folders}">
    <StackPanel Orientation="Horizontal" 
                Margin="2">
        <TextBlock Text="{Binding Path=Caption}"/>
    </StackPanel>
</HierarchicalDataTemplate>

<DataTemplate DataType="{x:Type models:FileModel}">
    <StackPanel Orientation="Horizontal"
                Margin="2">
        <TextBlock Margin="0,0,5,0">
            <Hyperlink NavigateUri="{Binding Caption}"
                        Foreground="#0C2DAA"
                        Command="{Binding SelectedLinkCommand}">
                <InlineUIContainer>
                    <TextBlock Text="{Binding Caption}" />
                </InlineUIContainer>

                <Hyperlink.Style>     
                    <Style TargetType="Hyperlink">       
                        <Style.Triggers>         
                            <Trigger Property="IsMouseOver" Value="False">
                                <Setter Property="TextDecorations" Value="{x:Null}" />         
                            </Trigger>       
                        </Style.Triggers>     
                    </Style>   
                </Hyperlink.Style> 

            </Hyperlink>
                    
        </TextBlock>

    </StackPanel>

</DataTemplate>