private void PrepareTransactions(List <TransactionFullModel> model) { model.Reverse(); if (TransactionFull == null) { TransactionFull = new BindableCollection <TransactionFullModel>(); } else { TransactionFull.Clear(); } foreach (var item in model) { if (item.TransactionType.Type != "Wpłata") { string amount = $"-{item.Amount}"; item.Amount = Convert.ToDecimal(amount); } if (item.TransactionInfo == null) { item.TransactionInfo = new TransactionInfoModel(); } TransactionFull.Add(item); } }