This class represents a EqualRadius constraint node in the owning Assoc2dConstraintGroup. 

It can be applied between two constrained circles (arcs).

Autodesk.AutoCAD.DatabaseServices.ConstraintGroupNode
    Autodesk.AutoCAD.DatabaseServices.GeometricalConstraint
        Autodesk.AutoCAD.DatabaseServices.EqualRadiusConstraint

Public Class EqualRadiusConstraint
Inherits GeometricalConstraint

public class EqualRadiusConstraint : GeometricalConstraint;