I wanted to have a quick play with F# and xUnit, and this sounded like a simple enough project to get started with.
using CSRakowski.AreThere;
var elements = GetElements();
if (ThereAre.Any(elements))
Console.WriteLine("There are some elements");
if (ThereAre.No(elements))
Console.WriteLine("There are no elements");
if (ThereAre.AtLeast(4, elements))
Console.WriteLine("There are at least 4 elements");