Is it possible to import Altium Design Rule file to CircuitStudio?
Or is there a way to convert the design rules files *.PcbDoc to *.RUL ?
A lot of PCB manufacturers give design rules files for Altium Designer, Eagle, etc, but CS is not already commonly used.
CircuitStudio only offers a subset of the full Altium Designer rules and cannot read Designer rule files. CS can import/export it's own rules, bring up the design rule dialog and right click on the top tree node - you will find import and export options.