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Flow Documents are typically defined using Extensible Application Markup Language (XAML), the XML-based standard markup language. XAML is particularly intuitive for Flow Documents, mainly because of the similarity to HTML. The following Flow Document sample creates a single paragraph of text with simple bold formatting applied to a few words:

<FlowDocument FontSize="14" FontFamily="Georgia">

  <Paragraph>

    <TextBlock>

      All about Resources in WPF

    TextBlock>

    <TextBlock>

      This blogpost talks about what resources are in WPF.

    TextBlock>

    <TextBlock>

      What this blog post doesn't talk about however, is databinding.

    TextBlock>

  Paragraph>

FlowDocument>

// Save 

var source = new FlowDocument();

var range = new TextRange(source.ContentStart, source.ContentEnd);

using (var stream = File.Create("output.pak"))

{

    range.Save(stream, DataFormats.XamlPackage);

}

// Load

using(var stream = File.OpenRead("output.pak"))

{

    var target = new FlowDocument();

    var range = new TextRange(target.ContentStart, target.ContentEnd);

    range.Load(stream, DataFormats.XamlPackage);    

}