using System;

using System.Collections.Generic;

using System.Linq;

​

public class Program

{

    public static void Main()

    {

        IEnumerable<int> numbers = new List<int> {1,2,3,4,5,6};

        var hasMoreThanThreeElements = numbers.HasMoreThanThreeElements();

​

        Console.WriteLine(hasMoreThanThreeElements);

    }

}

​

static class Extensions

{

    public static bool HasMoreThanThreeElements<T>(this IEnumerable<T> enumerable)

    {

        return enumerable.Count() > 3;

    }

}