TextTrimming for TextBlock
<Window xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" HorizontalAlignment="Center" VerticalAlignment="Center" TextElement.FontFamily="Palatino Linotype" FontSize="40"> <Border BorderBrush="Black" BorderThickness="2" Width="213"> <TextBlock TextTrimming="None" Text="Too much text." /> </Border> </Window>