This class represents a constrained NURBS spline node in the owning Assoc2dConstraintGroup.

Autodesk.AutoCAD.DatabaseServices.ConstraintGroupNode
    Autodesk.AutoCAD.DatabaseServices.ConstrainedGeometry
        Autodesk.AutoCAD.DatabaseServices.ConstrainedCurve
            Autodesk.AutoCAD.DatabaseServices.ConstrainedSpline

Public Class ConstrainedSpline
Inherits ConstrainedCurve

public class ConstrainedSpline : ConstrainedCurve;