MainWindow.xaml

<Button x:Name="DevToolsButton" Grid.Column="2" Width="32" Height="32"
        Click="DevToolsButton_Click" ToolTip="前往"
        Background="Transparent" BorderThickness="0" Margin="2,0,0,0" Cursor="Hand">
    <Button.Style>
        <Style TargetType="Button" BasedOn="{StaticResource {x:Type Button}}">
            <Setter Property="Background" Value="Transparent"/>
            <Setter Property="BorderThickness" Value="0"/>
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="Button">
                        <Border Background="{TemplateBinding Background}"
                                CornerRadius="4">
                            <ContentPresenter HorizontalAlignment="Center" VerticalAlignment="Center"/>
                        </Border>
                        <ControlTemplate.Triggers>
                            <Trigger Property="IsMouseOver" Value="True">
                                <Setter Property="Background" Value="#1976D2"/>
                            </Trigger>
                            <Trigger Property="IsPressed" Value="True">
                                <Setter Property="Background" Value="#1565C0"/>
                            </Trigger>
                        </ControlTemplate.Triggers>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>
    </Button.Style>
    <TextBlock Text="&#xE72E;" FontFamily="Segoe MDL2 Assets" FontSize="16" Foreground="#FFFFFF"/>
</Button>