'is it possible to draw on richtextbox (WPF, C#)

I programmed a text editor. The file can be saved in text or RTF format.

<RichTextBox Grid.Row="2" 
             x:Name="richtxtbox" 
             BorderBrush="#FFF1EDED"
             Block.LineHeight="2"                     
             Padding="2 5"
             SpellCheck.IsEnabled="True" 
             ScrollViewer.VerticalScrollBarVisibility="Visible"
             SelectionChanged="txtEditor_SelectionChanged" >
</RichTextBox> 

Texteditor created with C#, WPF, Richtextbox control

Now I want to draw different shapes like lines, triangles, circles, etc. on RichTextBox.

Like Draw in Microsoft Word:

Microsoft Word



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