Sum an array in CSharp

/*from  w  w  w.  j av a 2  s .c o m*/
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

public class MainClass {
    public static void Main() {
        int[] numbers = { 5, 4, 1, 3, 9, 8, 6, 7, 2, 0 };

        double numSum = numbers.Sum();

        Console.WriteLine("The sum of the numbers is {0}.", numSum);
    }
}