Hello, Mi,

The provided information is greatly appreciated. I confirm that there is missing information about the XmlFoldingTagger in the documentation and I have approved this bug report.

I have also updated your Telerik Points.

To be able to use the XmlFoldingTagger in the RadSyntaxEditor control, you need to register it in TaggersRegistry the same way as the other taggers:

 XmlFoldingTagger xmlFoldingTagger = new XmlFoldingTagger(this.radSyntaxEditor1.SyntaxEditorElement);
 this.radSyntaxEditor1.TaggersRegistry.RegisterTagger(xmlFoldingTagger);

I hope this helps. Should you have other questions do not hesitate to contact us.

Regards,
Nadya
Progress Telerik