This wraps the ObjectARX AcDbAssocOffsetSurfaceActionBody class.

Autodesk.AutoCAD.DatabaseServices.DBObject
    Autodesk.AutoCAD.DatabaseServices.AssocActionBody
        Autodesk.AutoCAD.DatabaseServices.AssocParamBasedActionBody
            Autodesk.AutoCAD.DatabaseServices.AssocSurfaceActionBody
                Autodesk.AutoCAD.DatabaseServices.AssocOffsetSurfaceActionBody

Public Class AssocOffsetSurfaceActionBody
Inherits AssocSurfaceActionBody

public class AssocOffsetSurfaceActionBody : AssocSurfaceActionBody;