Is it possible to Justify (not center) text in TextBox? I am aware of
txt.TextAlign = HorizontalAlignment.Left;
for example, but is it possible to justify it left AND right?
I think what the OP is going for is this http://en.wikipedia.org/wiki/Justification_(typesetting) then look under this heading
Justified (flush left and right)
I am afraid there is no easy way to do this. You would need to do as Damith suggested and create a custom control for it, and even that wont be easy, because every time you enter a letter, your text spacing will shrink and it will look funny. If you are wanting to do a read-only textbox, that could be done, but if you want the user to add text to it... I think you would need a real good reason to take the time to implement this.