public static string tryGetDocBoxLabel() { string D30_Path = file_structure.getPathFor("D30"); string docBoxLabelGUID = System.IO.File.ReadAllText(D30_Path); Guid searchGuid = new Guid(docBoxLabelGUID); Rhino.DocObjects.ObjRef docBox = new Rhino.DocObjects.ObjRef(searchGuid); try { string test = docBox.TextEntity().ToString(); return(searchGuid.ToString()); } catch (Exception e) { return("error"); } }