using System;

using System.Linq;

public class Program

{

    public static void Main()

    {      

        try

        {       

        int[] myNumbers = new int[] { 100,250,1000};

        int sums;

        if (myNumbers == null || myNumbers.Length == 0){ sums=0;Console.Write(" Sum " + sums + "\n");}

        var results = new int[myNumbers.Length];

        results[0] = myNumbers[0] + myNumbers[1];

        for (var i = 1; i < myNumbers.Length - 1; i++)

        {

         results[i] = results[i - 1] + myNumbers[i + 1];

            Console.Write(" Sub Total " + results[i] + "\n");

        }       

        var sumOfCumulativeSums = results.Sum();

        Console.Write(" sumOfCumulativeSums " + sumOfCumulativeSums + "\n");    

            }

        catch

        {

            Console.Write(" sumOfCumulativeSums " + "error" + "\n");    

        }

    }

​

}