private static async Task AddReportsToArchive(GoogleSheets sheets, ServiceContext serviceContext) { List <IList <object> > archiveReports = new List <IList <object> >(); for (int i = 0; i < serviceContext.TotalHouses; i++) { archiveReports.AddRange(serviceContext.Houses[i].GetObjects()); } UpdateInfo($"Сохранение отчета ..."); var oldReports = await sheets.GetArchiveReportsInfoAsync(); archiveReports.AddRange(oldReports); await sheets.UpdateArchiveReportsInfoAsync(archiveReports); }