async Task DbStoreBackupAsync(string store, IDbStore dbStore, string latestBackupDirPath) { try { IList <Item> items = new List <Item>(); await dbStore.IterateBatch( int.MaxValue, (key, value) => { items.Add(new Item(key, value)); return(Task.CompletedTask); }); await this.dataBackupRestore.BackupAsync(store, latestBackupDirPath, items); } catch (IOException exception) { throw new IOException($"The backup operation for {store} failed with error.", exception); } }