public static _AcDb.ResultBuffer GetNonPlottableLayers(_AcDb.ResultBuffer rb) { List <string> layerNames = new List <string>(); Globs.GetNonPlottableLayers(layerNames); if (layerNames.Count > 0) { _AcDb.ResultBuffer rbRet = new _AcDb.ResultBuffer(); foreach (var name in layerNames) { rbRet.Add(new _AcDb.TypedValue((int)_AcBrx.LispDataType.Text, name)); } return(rbRet); } else { return(null); } }