FizzBuzz on C# as generic solution using LINQ.

FizzBuzz.LINQ.cs

[Test]
public void FizzBuzz()
{
	var rules = new Dictionary<int, string> { { 3, "Fizz" }, { 5, "Buzz" } };
	Func<int, string> translate = i =>
		rules.Aggregate((string)null, (s, x) => i % x.Key == 0 ? (s == null ? x.Value : s + x.Value) : s)
		?? i.ToString();

	var words = Enumerable.Range(9, 7).Select(translate).ToArray();
	CollectionAssert.AreEqual(new[] { "Fizz", "Buzz", "11", "Fizz", "13", "14", "FizzBuzz" }, words);
}