namespace FizBuzV2Multicollection

{

    internal class Program2

    {

        static void Main2(string[] args)

        {

            // v1

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

            {

               if (i % 3 == 0 && i % 5 == 0)

               {

                   Console.WriteLine("fizzbuzz");

               }

               else if (i % 3 == 0)

               {

                   Console.WriteLine("fizz");

               }

               else if (i % 5 == 0)

               {

                   Console.WriteLine("buzz");

               }

               else

               {

                   Console.WriteLine(i);

               }

            }

​

            // v2 

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

            {

               var flags = false;

​

               if (i % 3 == 0)

               {

                   flags = true;

                   Console.Write("fizz");

               }

               if (i % 5 == 0)

               {

                   flags = true;

                   Console.Write("buzz");

               }

​

               if(flags)

               {

                   Console.WriteLine();

               }

               else

               {

                   Console.WriteLine(i);

               }

            }

​

            // v3

            var rules = new Dictionary<Func<int, bool>, string>

            {

               { x => x % 3 == 0, "Fizz" },

               { x => x % 5 == 0, "Buzz" },

            };

​

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

            {

               var keys = rules.Where(r => r.Key(i)).ToList();

               var values = keys.Select(x => x.Value);

               var res = string.Concat(values);

​

               var result = string.Concat(rules.Where(r => r.Key(i)).Select(r => r.Value));

               Console.WriteLine(string.IsNullOrEmpty(result) ? i.ToString() : result);

            }

        }

    }

}

​