Simple underline decoration
<Window x:Class="Decorations.Window1" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="Decorations" Height="300" Width="300"> <Grid> <TextBlock x:Name="text" Text="Decorations" /> </Grid> </Window> //File:Window.xaml.vb Imports System Imports System.Collections.Generic Imports System.Text Imports System.Windows Imports System.Windows.Controls Imports System.Windows.Data Imports System.Windows.Documents Imports System.Windows.Input Imports System.Windows.Media Imports System.Windows.Media.Imaging Imports System.Windows.Shapes Namespace Decorations Public Partial Class Window1 Inherits System.Windows.Window Public Sub New() InitializeComponent() text.TextDecorations = TextDecorations.Underline End Sub End Class End Namespace