Count-Positive-Sum-Negative.cs

using System;
using System.Collections.Generic;
using System.Linq;

public class Kata
{
    public static int[] CountPositivesSumNegatives(int[] input)
    {
        if (input == null || input.Length == 0) return new int[0];
        return new int[] { input.Where(x => x > 0).Count(), input.Where(x => x < 0).Sum() };
    }
}