This .NET class wraps the AcPlPlotConfigManager ObjectARX class. 

PlotConfigManager exposes access to plot configurations, plot style tables, devices, and PC3 files available on the system. This class is a singleton with a global method that returns a global instance of the object. 

Autodesk.AutoCAD.PlottingServices.PlotConfigManager

Public sealed Class PlotConfigManager

public sealed class PlotConfigManager;