This class represents a constraint node in the owning Assoc2dConstraintGroup. 

It is the base class for all kinds of constraints, including geometrical and dimensional constraints.

Autodesk.AutoCAD.DatabaseServices.ConstraintGroupNode
    Autodesk.AutoCAD.DatabaseServices.GeometricalConstraint
        Autodesk.AutoCAD.DatabaseServices.ColinearConstraint
        Autodesk.AutoCAD.DatabaseServices.CompositeConstraint
        Autodesk.AutoCAD.DatabaseServices.ConcentricConstraint
        Autodesk.AutoCAD.DatabaseServices.EqualCurvatureConstraint
        Autodesk.AutoCAD.DatabaseServices.EqualDistanceConstraint
        Autodesk.AutoCAD.DatabaseServices.EqualHelpParameterConstraint
        Autodesk.AutoCAD.DatabaseServices.EqualLengthConstraint
        Autodesk.AutoCAD.DatabaseServices.EqualRadiusConstraint
        Autodesk.AutoCAD.DatabaseServices.ExplicitConstraint
        Autodesk.AutoCAD.DatabaseServices.FixedConstraint
        Autodesk.AutoCAD.DatabaseServices.MidPointConstraint
        Autodesk.AutoCAD.DatabaseServices.NormalConstraint
        Autodesk.AutoCAD.DatabaseServices.ParallelConstraint
        Autodesk.AutoCAD.DatabaseServices.PerpendicularConstraint
        Autodesk.AutoCAD.DatabaseServices.PointCoincidenceConstraint
        Autodesk.AutoCAD.DatabaseServices.PointCurveConstraint
        Autodesk.AutoCAD.DatabaseServices.SymmetricConstraint
        Autodesk.AutoCAD.DatabaseServices.TangentConstraint

Public Class GeometricalConstraint
Inherits ConstraintGroupNode

public class GeometricalConstraint : ConstraintGroupNode;