using System;

using System.Linq;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

        int[] numbers = new int[] {

            1, 2, 3, 4, 5, 6, 7, 8, 9, 10

        };

        var result = numbers.Sum();

        Console.WriteLine(string.Format("total is {0}", result));

    }

}