private static void Main()
{
IBankAccount venusAccount = new SaverAccount();
ITransferBankAccount jupiterAccount=new CurrentAccount();
venusAccount.PayIn(300);
jupiterAccount.PayIn(400);
jupiterAccount.TransferTo(venusAccount,200);
Console.WriteLine(venusAccount.ToString());
Console.WriteLine(jupiterAccount.ToString());
}
private static void Main()
{
// without double inheritence.
var venusAccount = new SaverAccount();
var jupiterAccount=new GoldAccount();
venusAccount.PayIn(200);
jupiterAccount.PayIn(300);
Console.WriteLine(venusAccount.ToString());
jupiterAccount.PayIn(400);
jupiterAccount.Withdraw(600);
jupiterAccount.Withdraw(200);
Console.WriteLine(jupiterAccount.ToString());
}