private void btnSpendByPayee_Click(object sender, System.EventArgs e) { var payeesApi = new PayeesApi(); var payees = payeesApi.GetPayees(_selectedBudget.Id); List <PaidPerPayeeModel> models = new List <PaidPerPayeeModel>(); TransactionsApi transactionApi = new TransactionsApi(); foreach (var payee in payees.Data.Payees) { PaidPerPayeeModel newModel = new PaidPerPayeeModel(); var transactions = transactionApi.GetTransactionsByPayee(_selectedBudget.Id, payee.Id, null, string.Empty); newModel.Name = payee.Name; foreach (var transaction in transactions.Data.Transactions) { double transAsDecimal = Convert.ToDouble(transaction.Amount) / 1000; if (transaction.Amount != null) { newModel.TotalSpend += transAsDecimal; } } models.Add(newModel); } using (System.IO.StreamWriter file = new System.IO.StreamWriter(@"test.csv")) { file.WriteLine($"\"Name\";\"Total Spend\""); foreach (var model in models) { if (model.TotalSpend >= 0 || model.Name.StartsWith("Transfer :")) { continue; } file.WriteLine($"\"{model.Name}\";\"{model.TotalSpend}\""); } } }