Part 5 - Inheritance Example 2

StatesPaymentType.cs

public abstract class StatesPaymentType : PaymentType
{
    public new static readonly PaymentType DebitCard = new DebitCardType();

    public new static readonly PaymentType CreditCard = new CreditCardType();

    public static readonly PaymentType Bitcoin = new BitCoinType();

    private class BitCoinType : PaymentType
    {
        public BitCoinType() : base(3, "Bitcoin")
        {
        }

        public override string Code => "BT";
    }

    protected StatesPaymentType(int value, string name = null) : base(value, name)
    {
    }
}