public void Execute()
{
var arguments = new[] { "Id", "Amount", "Term", "Interest rate" };
IDialog dialog = uiFactory.CreateDialog();
var input = dialog.ShowDialog(arguments).ToArray();
string id = input[0];
decimal amount = Decimal.Parse(input[1]);
int term = Int32.Parse(input[2]);
double interestRate = Double.Parse(input[3]);
Loan loan = factory.createLoan(id, amount, term, interestRate);
loan.AddObserver(uiFactory.CreateLoanView());
repository.Add(loan);
}