Q:

Textblock displaying "..." instead of "-" when Width="Auto"

I have a Textblock that shows 3 Dots instead of a Minus when Width is set to Auto.  The Font is Arial and the FontSize is 20.  The Width during Runtime is 7. 
<:TextBlock 
    x:Name="LabelText" 
    MaxHeight="50" 
    TextTrimming="CharacterEllipsis" 
    TextWrapping="Wrap" 
    HorizontalAlignment="Left" 
    VerticalAlignment="Center" 
    Grid. Column="1"
    Margin="5,0,0,0" 
    Style="{StaticResource TextLabelFontStyle}" 
    Width="Auto" />   

Anyone know why i dont see the Minus? 

A:

This must be some strange TextBlock behaviour.  I changed the  HorizontalAlignment="Left" to  HorizontalAlignment="Stretch" and added TextAlignment="Left".  Now it wokrks properly.