public static void Main(string[] strings)
{
MyMoney dm = new MyMoney();
dm.CurrencyValue = 2.50M;
Console.WriteLine(dm.CurrencyValue);
Dollar dollar = new Dollar();
dollar.InitDollar(1.2M);
dollar.EuroValue = dm.EuroValue;
Console.WriteLine(dollar.CurrencyValue);
dollar.CurrencyValue = 2 * dollar.CurrencyValue;
dm.EuroValue = dollar.EuroValue;
Console.WriteLine(dm.CurrencyValue);
}