public IHttpActionResult GetCountries(string code)
 {
     CountryDatabase countryDatabase = new CountryDatabase();
     Country country = countryDatabase.Countries.FirstOrDefault((c) => c.ISO == code);
     if (country == null)
     {
         return NotFound();
     }
     return Ok(country);
 }
 public IEnumerable<Country> GetCountries()
 {
     CountryDatabase countryDatabase = new CountryDatabase();
     return countryDatabase.Countries;
 }