public class Country
{
  public static readonly Country US = new Country("US", "United States", "USD");
  public static readonly Country GB = new Country("GB", "Great Britain", "GBP");

  public string CountryCode { get; private set; }
  public string Description { get; private set; }
  public string Currency { get; private set; }

  Country(string countryCode, string description, string currency)
  {
    CountryCode = countryCode;
    Description = description;
    Currency = currency;
  }
}