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        public void Test()
        {
            var a = new ATMDispenser(100, 1);
            var b = new ATMDispenser(50, 2);
            var c = new ATMDispenser(20, 5);

            a.SetNext(b);
            b.SetNext(c);

            var x = a.Check(140);

angrynerds-marcin

    public abstract class ATMDispenserAbstract
    {

        protected ATMDispenserAbstract Next;

        public void SetNext(ATMDispenserAbstract next)
        {
            Next = next;
        }

angrynerds-marcin

    public abstract class RecommendedVideo
    {
        protected RecommendedVideo Next;

        public void SetNext(RecommendedVideo next)
        {
            Next = next;
        }

        public abstract string GetVideo(int age);

angrynerds-marcin

       public void Test()
        {
            var polandTaxCalculator = new PolandTaxCalculator();
            var germanyTaxCalculator = new GermanyTaxCalculator();
            var norwayTaxCalculator = new NorwayTaxCalculator();
            var franceTaxCalculator = new FranceTaxCalculator();
            var russiaTaxCalculator = new RussiaTaxCalculator();

            polandTaxCalculator.SetNext(germanyTaxCalculator);
            germanyTaxCalculator.SetNext(norwayTaxCalculator);

angrynerds-marcin

    public abstract class TaxCalculator
    {
        protected TaxCalculator Next;

        public void SetNext(TaxCalculator next)
        {
            Next = next;
        }

        public abstract double GetValue(double total, string countryName);

angrynerds-marcin

public class TaxCalculator
    {
        private readonly string countryName;

        public TaxCalculator(string countryName)
        {
            this.countryName = countryName;
        }

        public double GetValue(double total)