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>