When I protect the worksheet, the SheetName still can be edited?
Well, this behavior is same as per MS Excel. You may confirm this, if you manually protect a worksheet, you may edit the sheet’s name in MS Excel, so Aspose.Cells follows MS Excel’s standards. I think for your need, you may try to make sheet tab bar invisible or hidden, see the topic for your reference:
Thanks, it is excel standard, there is no problem.