This .NET class wraps the AcDbObjectContext ObjectARX class. 

An abstract base class for representing a particular context which may affect the properties and/or behavior of one or more types of objects.Classes that are derived from this base class are used to represent a particular type of context such as annotation scale.

Autodesk.AutoCAD.DatabaseServices.ObjectContext
    Autodesk.AutoCAD.DatabaseServices.AnnotationScale

Public abstract Class ObjectContext
Inherits RXObject

public abstract class ObjectContext : RXObject;