Create round edge button in wpf

Create round edge button in wpf.

<Style TargetType="{x:Type Button}">            

<Setter Property="Template">

                <Setter.Value>

                    <ControlTemplate TargetType="Button">

                        <Border CornerRadius="8" Background="{TemplateBinding Background}"

                                BorderThickness="1">

                            <ContentPresenter HorizontalAlignment="Center" VerticalAlignment="Center">

                            </ContentPresenter>

                        </Border>

                    </ControlTemplate>

                </Setter.Value>

            </Setter>
</Style>