ShippingAddressPage.Map.cs

public partial class ShippingAddressPage
{
    public string Country
    {
        get
        {
            return new SelectElement(driver.FindElement(By.Name("enterAddressCountryCode"))).SelectedOption.Text;
        }
        set
        {
            new SelectElement(driver.FindElement(By.Name("enterAddressCountryCode"))).SelectByText(value);
        }
    }

    public string FullName
    {
        get
        {
            return driver.FindElement(By.Id("enterAddressFullName")).Text;
        }
        set
        {
            driver.FindElement(By.Id("enterAddressFullName")).SendKeys(value);
        }
    }

    // other elements
}