<Window x:Class="MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:sys="clr-namespace:System;assembly=mscorlib"
        xmlns:l="clr-namespace:PreservingIndentationDemo"
        Title="MainWindow"
        Height="350"
        Width="525">
    <Window.Resources>
        <sys:String x:Key="longString"
                    xml:space="preserve">&#x09;this is really long and wrapped

&#x09;&#x09;another line this is also really long and wrapped

&#x09;one more line this is also really long and wrapped

another line this is also really long and wrapped

&#x09;&#x09;another line this is also really long and wrapped
        </sys:String>
    </Window.Resources>
    <Grid>
        <FlowDocumentScrollViewer l:IndentationProvider.Text="{StaticResource longString}" />
        <!--<RichTextBox l:TextToParaHelper.Text="{StaticResource longString}" IsReadOnly="True"/>-->
        <!--<FlowDocumentReader l:TextToParaHelper.Text="{StaticResource longString}" />-->
        <!--<FlowDocument l:TextToParaHelper.Text="{StaticResource longString}" />-->
    </Grid>
</Window>