This .NET class wraps the AcGeNurbSurface ObjectARX class. It represents generic NURB parametric surface.

Autodesk.AutoCAD.Geometry.Entity3d
    Autodesk.AutoCAD.Geometry.Surface
        Autodesk.AutoCAD.Geometry.NurbSurface

Public sealed Class NurbSurface
Inherits Surface

public sealed class NurbSurface : Surface;