Wpf 我应该如何创建具有自己的可视化表示的自定义flowdocument控件？

我如何创建一个控件，允许我不断重复某些FlowDocument元素

我想让Xaml看起来像这样：

<MyCustomControl>
    <Paragraph>Paragraph 1</Paragraph>
</MyCustomControl>

<Section>
    <Paragraph>This is Header Text</Paragraph>
    <Section> <!-- this is user area -->
        <Paragraph>Paragraph 1</Paragraph>
    </Section>
    <Paragraph>This is Footer Text</Paragraph>
</Section>

<MyCustomControl StuffOnInside="&ltParagraph&gtParagraph 1&lt/Paragraph&gt" />

<MyCustomControl StuffOnInside="&ltParagraph&gtParagraph 1&lt/Paragraph&gt">
    <Paragraph>This is Header Text</Paragraph>
    <Section> <!-- this is user area -->
        <Paragraph>Paragraph 1</Paragraph>
    </Section>
    <Paragraph>This is Footer Text</Paragraph>
</MyCustomControl>