WPF

..more customers..<br />
..more customers..<br />
<Customers><br />
  <CustomerID>NORTS</CustomerID> <br />
  <CompanyName>North/South</CompanyName> <br />
  <ContactName>Simon Crowther</ContactName> <br />
  <ContactTitle>Sales Associate</ContactTitle> <br />
  <Address>South House 300 Queensbridge</Address> <br />
  <City>London</City> <br />
  <PostalCode>SW7 1RZ</PostalCode> <br />
  <Country>UK</Country> <br />
  <Phone>(171) 555-7733</Phone> <br />
  <Fax>(171) 555-2530</Fax> <br />
</Customers><br />
..more customers..<br />
..more customers..<br />
<br />
..more orders..<br />
..more orders..<br />
<Orders><br />
  <OrderID>10614</OrderID> <br />
  <CustomerID>BLAUS</CustomerID> <br />
  <EmployeeID>8</EmployeeID> <br />
  <OrderDate>1995-08-29T00:00:00+02:00</OrderDate> <br />
  <RequiredDate>1995-09-26T00:00:00+02:00</RequiredDate> <br />
  <ShippedDate>1995-09-01T00:00:00+02:00</ShippedDate> <br />
  <ShipVia>3</ShipVia> <br />
  <Freight>1.93</Freight> <br />
  <ShipName>Blauer See Delikatessen</ShipName> <br />
  <ShipAddress>Forsterstr. 57</ShipAddress> <br />
  <ShipCity>Mannheim</ShipCity> <br />
  <ShipPostalCode>68306</ShipPostalCode> <br />
  <ShipCountry>Germany</ShipCountry> <br />
  </Orders><br />
..more orders..<br />
..more orders..<br />
<br />
..more order details..<br />
..more order details..<br />
<Order_x0020_Details><br />
  <OrderID>10599</OrderID> <br />
  <ProductID>62</ProductID> <br />
  <UnitPrice>49.3</UnitPrice> <br />
  <Quantity>10</Quantity> <br />
  <Discount>0</Discount> <br />
  </Order_x0020_Details><br />
..more order details..<br />
..more order details..

<Grid x:Name="LayoutRoot"
        VerticalAlignment="Top" Height="Auto">
    <Grid.ColumnDefinitions>
      <ColumnDefinition Width="150"/>
      <ColumnDefinition Width="*"/>
    </Grid.ColumnDefinitions>
    <Border x:Name="bdrLeft" Height="Auto"
            Background="{DynamicResource SplitRichTextBoxRightSideBGBrush}"
            BorderBrush="{DynamicResource SplitRichTextBoxRightSideBorderBrush}"
            BorderThickness="1,1,0,1"
            CornerRadius="3,0,0,3"
            VerticalAlignment="Stretch">
      <ContentPresenter x:Name="cpRightSide"
                        VerticalAlignment="Stretch"
                        HorizontalAlignment="Stretch"
                        Margin="0,0,0,0"
                        Width="Auto"
                        Height="Auto"
                        TextElement.Foreground="{DynamicResource SplitRichTextBoxLeftSideForegroundBrush}"/>
    </Border>
    <Border x:Name="bdrRight"
            Height="Auto"
            Grid.Column="1"
            Background="{DynamicResource TextBoxBGBrush}"
            BorderBrush="{DynamicResource TextBoxBorderBrush}"
            BorderThickness="1,1,1,1"
            CornerRadius="0,3,3,0"/>
    <RichTextBox x:Name="rtbMain" 
                 HorizontalAlignment="Center"
                 FontSize="{DynamicResource DefaultFontSize}"
                 Height="Auto"
                 BorderBrush="Transparent"
                 Background="Transparent"
                 Foreground="{DynamicResource DEFAULT_Font_Dark}"
                 VerticalAlignment="Center"
                 AcceptsReturn="False"
                 AcceptsTab="False"
                 Style="{DynamicResource ClearRichTextBoxStyle}"
                 Grid.Column="1"
                 Margin="0,3,0,3">
      <localControl:EnabledFlowDocument x:Name="efdMainDocument" PageWidth="{Binding ElementName=rtbMain, Path=ActualWidth}"/>
    </RichTextBox>
  </Grid>