Since 9ebbb73, code fences with a language label other than csharp, cplusplus, aspx, etc., are not rendered at all. Any other language label has to be edited out.

v0.7.0

v0.6.2

There needs to be a default case handler in Markdig.SyntaxHighlighting.LanguageTypeAdapter.Parse, so that code fences are always rendered, even if the label is unrecognized.