This wraps AcDbAssocPatchSurfaceActionBody class.

Autodesk.AutoCAD.DatabaseServices.DBObject
    Autodesk.AutoCAD.DatabaseServices.AssocActionBody
        Autodesk.AutoCAD.DatabaseServices.AssocParamBasedActionBody
            Autodesk.AutoCAD.DatabaseServices.AssocSurfaceActionBody
                Autodesk.AutoCAD.DatabaseServices.AssocPathBasedSurfaceActionBody
                    Autodesk.AutoCAD.DatabaseServices.AssocPatchSurfaceActionBody

Public Class AssocPatchSurfaceActionBody
Inherits AssocPathBasedSurfaceActionBody

public class AssocPatchSurfaceActionBody : AssocPathBasedSurfaceActionBody;