This .NET class wraps the AcGeEntity2d ObjectARX class. This is an abstract base class for all point set classes. Any class that is derived from this class represents a set of points in 2D space.

Autodesk.AutoCAD.Geometry.Entity2d
    Autodesk.AutoCAD.Geometry.BoundBlock2d
    Autodesk.AutoCAD.Geometry.ClipBoundary2d
    Autodesk.AutoCAD.Geometry.Curve2d
    Autodesk.AutoCAD.Geometry.CurveCurveIntersector2d
    Autodesk.AutoCAD.Geometry.PointEntity2d

Public abstract Class Entity2d
Inherits DisposableWrapper
Inherits ICloneable

public abstract class Entity2d : DisposableWrapper, ICloneable;