Question

Is there a simple way to make a fully square Button? Normally, a Button is a little rounded, so how do I achieve this?

Answer 1

If you mean to have width = height then see WPF dynamic layout: how to enforce square proportions (width equals height)?

If you mean to have square corners then set the CornerRadius of the Border to zero:

<ControlTemplate x:Key="SquareButton" TargetType="{x:Type Button}">  
<Border CornerRadius="0"/>  
</ControlTemplate>  

Then the button uses that template:

<Button Template="{StaticResource SquareButton}"/>