using System;

​

public interface IFizzBuzzRule

    {

        bool Check(int number);

        string GetResult(int number);

    }

​

    class FizzRule : IFizzBuzzRule

    {

        public bool Check(int number) => number % 3 == 0;

        public string GetResult(int number) => "Fizz";

    }

​

    class BuzzRule : IFizzBuzzRule

    {

        public bool Check(int number) => number % 5 == 0;

        public string GetResult(int number) => "Buzz";

    }

​

    class FizzBuzzRule : IFizzBuzzRule

    {

        public bool Check(int number) => number % 3 == 0 && number % 5 == 0;

        public string GetResult(int number) => "Fizz Buzz";

    }

​

    class DefaultRule : IFizzBuzzRule

    {

        public bool Check(int number) => true;

        public string GetResult(int number) => number.ToString();

    }

​

    class FizzBuzz

    {

        private readonly IFizzBuzzRule[] rules;

​

        public FizzBuzz()

        {

            rules = new IFizzBuzzRule[]

            {

                new FizzBuzzRule(),

                new FizzRule(),

                new BuzzRule(),

                new DefaultRule()

            };

        }

​

        public string GetResult(int number)

        {

            foreach (var rule in rules)

            {

                if (rule.Check(number))

                    return rule.GetResult(number);

            }

            return number.ToString();

        }

    }

    internal class Program

    {

        static void Main(string[] args)

        {

            FizzBuzz fizzBuzz = new FizzBuzz();

​

            for (int i = 1; i <= 100; i++)

            {

                Console.WriteLine(fizzBuzz.GetResult(i));

            }

        }

​

    }