using System;

using System.Linq;

​

public class Program

{

    public static void Main()

    {

        double[] doubles = {1.7, 2.3, 1.9, 4.1, 2.9};

​

        var product = doubles.Aggregate((runningProduct, nextFactor) => runningProduct * nextFactor);

        Console.WriteLine("Total product of all numbers: {0}", product);

    }

}