Using a delegate instead of a single-method interface

FizzBuzz4.cs

        public string FizzBuzz(int i)
        {
            Func<int, string> number = x => x.ToString();
            Func<int, string> fizz = x => "Fizz";
            Func<int, string> buzz = x => "Buzz";
            Func<int, string> fizzBuzz = x => "FizzBuzz";

            return new[] 
                {
                    fizzBuzz, //15
                    number, // 1
                    number, // 2
                    fizz, // 3
                    number, // 4
                    buzz, // 5
                    fizz, // 6
                    number, // 7
                    number, // 8
                    fizz, // 9
                    buzz, //10
                    number, //11
                    fizz, //12
                    number, //13
                    number, //14
                }[i % 15](i);
        }