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

It can be applied between two lines.

Autodesk.AutoCAD.DatabaseServices.ConstraintGroupNode
    Autodesk.AutoCAD.DatabaseServices.GeometricalConstraint
        Autodesk.AutoCAD.DatabaseServices.PerpendicularConstraint

Public Class PerpendicularConstraint
Inherits GeometricalConstraint

public class PerpendicularConstraint : GeometricalConstraint;