FizzBuzz using Yield, Func and IEnumerable

fizzbuzz.cs

 class Program
{
    static void Main(string[] args)
    {
        foreach (var i in FizzBuzz(100))
        {
            Console.WriteLine(i);
        }
    }

    private static IEnumerable<string> FizzBuzz(int maxvalue)
    {
        int count = 0;
        //yield return count.ToString();
        Func<int, string> FizzBuzz = (x) => ((x % 5 == 0 && x % 3 == 0) ? "FizzBuzz" : null);
        Func<int, string> Buzz = (x) => ((x % 5 == 0) ? "Buzz" : null);
        Func<int, string> Fizz = (x) => ((x % 3 == 0) ? "Fizz" : null);
        Func<int, string> Number = (x) => x.ToString();

        while (count < maxvalue)
        {
            count++;

            yield return FizzBuzz(count) ?? Buzz(count) ?? Fizz(count) ?? Number(count);
        }
    }
}