Hi Lisa McCabe,
We share general information on the forum. Could you please open the new incident in Direct Trac Developer Support System?
https://www.syncfusion.com/account/login?ReturnUrl=%2fsupport%2fdirecttrac%2fincidents so that we can provide you with the patch for this issue as well as you can take the advantage of the expertise of a dedicated support engineer and a guaranteed response time and we hope you will take advantage of this system as well.
CopyTo Method:
In our XlsIO, currently we do not have equivalent of CopyTo method.
Could you please let us know if you have any queries?
Regards,
Sathish