Hi Kevin,
Thanks for using Syncfusion products.
As you said, using FreezePanes method is correct solution to freeze the certain areas or panes in worksheet. We could see that your coding works correctly when we tested from our side.
For more information about Freezepane and SplitPane, Please visit the following links.
FreezePanes:
http://help.syncfusion.com/ug_94/Reporting/XlsIO/ASP.NET/default.htm?turl=Documents%2Ffreezepane.htmSplitPane:
http://help.syncfusion.com/ug_94/Reporting/XlsIO/ASP.NET/default.htm?turl=Documents%2Fsplitpane.htmThanks for your patience. Please let us know if you need any clarifications.
Thanks,
Manikandan.M