Example

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

namespace Example1
{
    class Program
    {
        static void Main(string[] args)
        {
            //Populates the 'values' list
            for (int i = 0; i < 10; i++)
                values.Add(i);

            Console.WriteLine(getSum);

        }

        static List<double> values = new List<double>();

        static double getSum
        {
            get
            {
                double sum = 0;

                foreach(double d in values)
                {
                    sum += d;
                }

                return sum;
            }
        }
    }
}