private static void print(int n, Account account)
{
Console.WriteLine("({0}):\n {1}\n {2}\n {3}", n,
account.Get(a => a.CashPosition).Get(p => p.Instrument).GetV(i => i.Key),
formatStr(account.Get(a => a.CashPosition).Get(p => p.Instrument).Get(i => i.Name)),
formatStr(account.Get(a => a.CashPosition).Get(p => p.Instrument).GetS(i => i.Name)));
}
static void Main(string[] args)
{
Account account = null;
print(1, account);
account = new Account();
print(2, account);
account.CashPosition = new Position();
print(3, account);
account.CashPosition.Instrument = new Instrument();
print(4, account);
account.CashPosition.Instrument.Key = 123;
account.CashPosition.Instrument.Name = "Euro";
print(5, account);
Console.WriteLine(typeof(int?));
Console.WriteLine(typeof(Nullable<int>));
Console.WriteLine(typeof(int?) == typeof(Nullable<int>));
}