Get rid of button border in WPF?

The method that I recently found to be most useful for this was to have your button use the style of a toolbars. This will only use the image or text while only showing button borders on mouse over.

<Button Style="{StaticResource {x:Static ToolBar.ButtonStyleKey}}"
        Content="save"
        Name="btnSaveEditedText" 
        Background="Transparent" 
        Foreground="White" 
        FontFamily="Tw Cen MT Condensed" 
        FontSize="30" 
        Margin="-280,0,0,10"
        Width="60"
        BorderBrush="Transparent"
        BorderThickness="0" />

You need to override the ControlTemplate of the Button:

<Button Content="save" Name="btnSaveEditedText" 
                Background="Transparent" 
                Foreground="White" 
                FontFamily="Tw Cen MT Condensed" 
                FontSize="30" 
                Margin="-280,0,0,10"
                Width="60"
                BorderBrush="Transparent"
                BorderThickness="0">
    <Button.Template>
        <ControlTemplate TargetType="Button">
             <ContentPresenter Content="{TemplateBinding Content}"/>
        </ControlTemplate>
    </Button.Template>
</Button>