This .NET class wraps the AcGsManager ObjectARX class. 

The Manager interface provides services that helps to hide the details of connecting AutoCAD and ARX applications to the graphics system (GS). 

Manager objects have a one-to-one relationship with MDI client windows and with Database objects. The function acgsGetGSManager() provides access to Manager objects.

Autodesk.AutoCAD.GraphicsSystem.Manager
    Autodesk.AutoCAD.GraphicsSystem.Manager2

Public Class Manager
Inherits DisposableWrapper

public class Manager : DisposableWrapper;