public static IEnumerable<Payment> GetPayments()
{
var payments = new List<Payment> {
new Payment { Amount = 100, PaymentTime = new PaymentTime {Year = 2012, Month =2}},
new Payment { Amount = 200, PaymentTime = new PaymentTime { Year = 2012, Month = 4 } },
new Payment {Amount = 300, PaymentTime = new PaymentTime { Year = 2012, Month = 5}}
};
return payments;
}