This .NET class wraps the AcDbPlotSettingsValidator ObjectARX class. 

This class exports access methods that validate data on an PlotSettings object before actually setting the data on the object.

Autodesk.AutoCAD.DatabaseServices.PlotSettingsValidator

Public sealed Class PlotSettingsValidator
Inherits DisposableWrapper

public sealed class PlotSettingsValidator : DisposableWrapper;

In order to ensure that the plot device and plot style table lists maintained within this class are up to date, it is highly recommended that RefreshLists() is called to rebuild them prior to using any of the methods of this class. It is not necessary to call RefreshLists() more than once before accessing methods within this class since this call can be expensive.

PlotSettings