private async void ReloadLastTransactions() { var transactionHelper = new TransactionsHelper(new TransactionsRepository()); try { var transactions = await transactionHelper .GetLastUserTransactions(Domain.Constants.Constants.TestUserId, 5); var listViewItems = GetTransactionsListViewItems(transactions); lastTransactions.Items.Clear(); lastTransactions.Items.AddRange(listViewItems); } catch (ArgumentNullException ex) { Error.ShowDialog(ex.Message); } }