using System;

using System.Collections.Generic;

using System.Linq;

public class Program

{

    public static void Main()

    {

        int[] myNumbers = {1,2,3,4,5,6,7};

        var evenTotal = TotalAllEvenNumbers(myNumbers);

        Console.WriteLine(evenTotal);

    }

    static long TotalAllEvenNumbers(int[] intArray) 

    {

        return intArray.Where(i => i % 2 == 0).Sum(i => (long)i);

    }

}