Hi Jack,
Thank you for your interest in Syncfusion products.
Currently we do not have support for to import and export RTF document files using Essential DocIO. We have logged a feature request regarding this.
Here is the link to know the status of the feature
http://www.syncfusion.com/support/features/docio/Default.aspx?ToDo=view&questId=970Please let me know if you have any other queries.
Best Regards,
Bhuvaneswari