带三角的Popup怎么实现

[aierda]

请教这种带尖角的Popup怎么实现呢，有例子参考吗

[config_man]

 <UserControl.Resources>

        <Style x:Key="tbStyle" TargetType="TextBlock">
            <Setter Property="FontSize" Value="13" />
            <Setter Property="VerticalAlignment" Value="Center" />
            <Setter Property="Foreground" Value="#fff" />
            <Setter Property="HorizontalAlignment" Value="Left" />
        </Style>
        
        
    </UserControl.Resources>
    <StackPanel x:Name="stackPanel" Orientation="Horizontal" Grid.Column="1" HorizontalAlignment="Stretch" VerticalAlignment="Top" Margin="15,15">

  
        
        <Path x:Name="myPath" Grid.Column="2" Data="M12,13 L5,18 L12,23Z" Margin="0" SnapsToDevicePixels="True"
                      Stroke="#FF98E165" Fill="#FF98E165" />

        <TextBox x:Name="tbContent" MaxWidth="355" TextWrapping="Wrap" FontSize="13" Padding="10" IsReadOnly="True" BorderThickness="0" VerticalContentAlignment="Center"  
                         Text="经过的时候，NAVER BEEN TO ME，Gerge,WELCOME TO CALIFONIA" FlowDirection="LeftToRight"
                         BorderBrush="#FF98E165" Background="#FF98E165" />

        
    </StackPanel>

[aierda]

谢谢这位兄弟，非常不错，值得参考