using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace RajakKlase
{
    class Program
    {
        static void Main(string[] args)
        {
            List<int> numbers = new List<int>();
            bool stayInLoop = true;
            string unosKorisnika;
            int unetiBroj;

            do
            {
                Console.Write("Unesite broj (ostavi prazno za zavrsetak): ");
                unosKorisnika = Console.ReadLine();
                if (string.IsNullOrEmpty(unosKorisnika))
                {
                    break;
                }
                unetiBroj = Convert.ToInt32(unosKorisnika);
                numbers.Add(unetiBroj);

            } while (stayInLoop);

            Console.WriteLine("Suma svih brojeva je {0}", Suma.CalculateSum(numbers));

            Console.ReadKey();
        }
    }
}





using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace RajakKlase
{
    class Suma
    {

        public static int CalculateSum(List<int> numbers)
        {
            int brojac = 0;
            foreach (int number in numbers)
            {
                brojac += number;

            }

            return brojac;
        }
    }
}