How to bind to a parent DataContext property in WPF

WPF > RelativeSource > FindAncestor

Bind to a parent DataContext property example

IsEnabled="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type Window}}, Path=DataContext.YourParentProperty}"

Add a Border to a TextBlock WPF

WPF > Windows > Controls > Border

If you want to display a border around your content, you must place the elements within a parent Border element.

Example: Add a Border to a TextBlock

<Border BorderBrush="Black" BorderThickness="1" HorizontalAlignment="Left"                     VerticalAlignment="Top">

            <TextBlock HorizontalAlignment="Left" TextWrapping="Wrap"  Text="TextBlock"  VerticalAlignment="Top"/>

 </Border>

Table in RichTextBox WPF C#

WPF > Controls  > ContentControl > RichTextBox > Table

XAML

<Window x:Class="Editor.MainWindow"

        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

        Title="MainWindow" Height="350" Width="525">

    <Grid>

        <RichTextBox>

            <FlowDocument>

                <Table>

                    <TableRowGroup>

                        <TableRow>

                            <TableCell>

                                <Paragraph>Cell1</Paragraph>

                            </TableCell>

                            <TableCell>

                                <Paragraph>Cell2</Paragraph>

                            </TableCell>

                        </TableRow>

                    </TableRowGroup>

                </Table>

            </FlowDocument>

        </RichTextBox>

    </Grid>

</Window>