Having never needed to do this, this is mostly a guess.
Layout layout = // assign to the layout whose page setup is to be set to 'none'
PlotSettings plotSettings = new PlotSettings(layout.ModelType);
layout.CopyFrom(plotSettings);
If that works, You may also need to change the Layout's PlotSettingsName property to an empty string or null
@Rockit_for_Revitwrote:
How can I set the PageSetup to none for all Layouts? In Lisp or .net.
The examples given below are to set the page setup, but what if I want no page setups.
http://help.autodesk.com/view/ACD/2016/ENU/?guid=GUID-56BD3247-471C-4471-A238-FFDFDC3BD2E4
Kind Regards
David
