Per that blog post, it looks like the Markdown syntax language came out back in the 2013.1 version but for the WPF version, not the WinForms version. The WPF version had a different API than the WinForms version. That being said, our 2020.1 version moved the WinForms version over to the same API used in the WPF and UWP versions. And as part of that move, allowed us to port our better syntax languages and add-ons over to WinForms. So the 2020.1 WinForms version does ship with a sample Markdown syntax language.
If you download that version and look in the "SampleBrowser\ProductSamples\SyntaxEditorSamples\Languages\Projects\Markdown.langproj" file, you'll see syntax that is pretty similar to the WinForms v4.0 XML definition syntax. You should be able to port the same concepts over on your own with that.
Please log in to a validated account to post comments.